Hướng dẫn is 0 and null the same in php? - 0 và null có giống nhau trong php không?

Question

Bạn gợi ý về một câu hỏi sâu sắc: Khi nào một biểu hiện nên đúng?

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0 có tính là PHP trống không?
Có sự khác biệt giữa giá trị null và không?
NULL trong PHP là gì?
Tại sao NULL không bằng 0?

Dưới đây, tôi sẽ giải thích tại sao những gì bạn đang làm không hoạt động và cách khắc phục nó.

Trong nhiều ngôn ngữ null, 0 và chuỗi trống ("") đều đánh giá là sai, điều này có thể làm cho các câu if khá ngắn gọn và trực quan, nhưng null, 0 và "" cũng là tất cả các loại khác nhau. Làm thế nào họ nên được so sánh?

Trang này cho chúng tôi biết rằng nếu chúng tôi có hai biến được so sánh, thì các biến được chuyển đổi như sau (thoát khỏi bảng ở trận đấu đầu tiên)

Type of First  Type of Second   Then
null/string    string           Convert NULL to "", numerical/lexical comparison
bool/null      anything         Convert to bool, FALSE < TRUE

Vì vậy, bạn đang so sánh một số null so với một số. Do đó, cả null và số được chuyển đổi thành boolean. Trang này cho chúng tôi biết rằng trong một chuyển đổi như vậy, cả null và 0 đều được coi là

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

1.

Biểu thức của bạn bây giờ đọc,

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

2, tất nhiên, điều này là đúng.

Nhưng không phải những gì bạn muốn.

Trang này cung cấp một danh sách các nhà khai thác so sánh của PHP.

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

Bộ so sánh đầu tiên là so sánh bạn đang sử dụng bây giờ. Lưu ý rằng nó thực hiện các chuyển đổi tôi đã đề cập trước đó.

Sử dụng bộ so sánh thứ hai sẽ khắc phục vấn đề của bạn. Vì null và một số không thuộc cùng loại, so sánh

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

3 sẽ trả về sai, thay vì thực hiện chuyển đổi loại như toán tử

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

4.

Hi vọng điêu nay co ich.

Edgar tại Goodforall Dot EU ¶

Blue Dot Hirano tại Gmail Dot Com ¶string while

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

6 is an int. Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b.
7 is a bool while

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

8 is a string.

8 năm trước:
Ẩn danh ¶is_numeric().

8 năm trước:
Ẩn danh ¶null0. Instead, consider using empty() or isset() and/or initialize your variables.

8 năm trước:

Ẩn danh ¶null1. Any loose or strict comparisons of this value against any other value, including itself, but except null2, will have a result of

Example   Name                Result
$a ==  $b  Equal              TRUE if $a equals $b after type juggling.
$a === $b  Identical          TRUE if $a equals $b, AND they are of the same type.
$a !=  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a <>  $b  Not equal          TRUE if $a not equals $b after type juggling.
$a !== $b  Not identical      TRUE if $a not equals $b, or they are not of the same type.
$a  <  $b  Less than          TRUE if $a is strictly less than $b.
$a  >  $b  Greater than       TRUE if $a is strictly greater than $b.
$a <=  $b  Less than/equal    TRUE if $a is less than or equal to $b.
$a >=  $b  Greater than/equal TRUE if $a is greater than or equal to $b.

7. (i.e. null4 and null5) Examples of operations that produce null1 include null7, null8, and null9.

So sánh $ x với các hàm PHP

Biểu hiện	gettype()	empty()	is_null()	isset()	Bool: `0`0 : `0`0
`0`1	sợi dây	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`0`6	VÔ GIÁ TRỊ	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`""`1	VÔ GIÁ TRỊ	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`""`1	VÔ GIÁ TRỊ	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`""`1	$ x không được xác định	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`0	$ x không được xác định	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`if`0	mảng	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`5	mảng	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`if`5	int	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`null`0	int	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
bool	int	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`5	int	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`0`0	sợi dây	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`0`6	sợi dây	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`0`6	sợi dây	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`0`6	sợi dây	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`0`6	sợi dây	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2
`0`6	sợi dây	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2

06

	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 23	`0`	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 25	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 26	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 27	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 28	`null`	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 30	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 31	`""`
`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2
VÔ GIÁ TRỊ	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`""`1	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	$ x không được xác định*	$ x không được xác định*
`if`0	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
mảng	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`5	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`0	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2
bool	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`5	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	$ x không được xác định*	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`0	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	$ x không được xác định*	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2

if0null2 prior to PHP 8.0.0.

mảng

	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 23	`0`	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 25	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 26	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 27	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 28	`null`	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 30	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 31	`""`
`null`2	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
VÔ GIÁ TRỊ	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`""`1	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`0	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
mảng	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`5	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`0	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
bool	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`null`5	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7
`if`0	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	Example Name Result $a == $b Equal TRUE if $a equals $b after type juggling. $a === $b Identical TRUE if $a equals $b, AND they are of the same type. $a != $b Not equal TRUE if $a not equals $b after type juggling. $a <> $b Not equal TRUE if $a not equals $b after type juggling. $a !== $b Not identical TRUE if $a not equals $b, or they are not of the same type. $a < $b Less than TRUE if $a is strictly less than $b. $a > $b Greater than TRUE if $a is strictly greater than $b. $a <= $b Less than/equal TRUE if $a is less than or equal to $b. $a >= $b Greater than/equal TRUE if $a is greater than or equal to $b. 7	`null`2

PHP tại Richardneill Dot org ¶ ¶

10 năm trước

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12 năm trước

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17 năm trước

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15 năm trước

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16 năm trước

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2 năm trước

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12 năm trước

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17 năm trước

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15 năm trước

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4 năm trước

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8 năm trước ¶

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4 năm trước

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2 năm trước

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17 năm trước

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0 có tính là PHP trống không?

Những điều sau đây được coi là trống: "" (một chuỗi trống) 0 (0 là một số nguyên) "0" (0 dưới dạng chuỗi) null."" (an empty string) 0 (0 as an integer) "0" (0 as a string) NULL.

Có sự khác biệt giữa giá trị null và không?

Câu trả lời cho điều đó khá đơn giản: một null có nghĩa là không có giá trị, chúng tôi đang nhìn vào một ô trống/trống và 0 có nghĩa là chính giá trị là 0.a NULL means that there is no value, we're looking at a blank/empty cell, and 0 means the value itself is 0.

NULL trong PHP là gì?

Giá trị null đặc biệt đại diện cho một biến không có giá trị.NULL là giá trị duy nhất có thể có của loại null.Một biến được coi là null nếu: nó đã được chỉ định null hằng số.Nó chưa được đặt thành bất kỳ giá trị nào.represents a variable with no value. null is the only possible value of type null. A variable is considered to be null if: it has been assigned the constant null . it has not been set to any value yet.

Tại sao NULL không bằng 0?

Bạn có thể nghĩ về nó như thế này, null chỉ có nghĩa là giá trị là "không xác định".Nhưng "0" định nghĩa biến là một số nguyên, 0 là một giá trị!Null không được tuyên bố là bất cứ điều gì.Do đó nó là sai.Null is not declared to be anything. Therefore it is false.

programming php Check null PHP Is false php Null PHP Compare null PHP

Hướng dẫn is 0 and null the same in php? - 0 và null có giống nhau trong php không?

0 có tính là PHP trống không?

Có sự khác biệt giữa giá trị null và không?

NULL trong PHP là gì?

Tại sao NULL không bằng 0?

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