Cảnh báo trong PHP là gì?

Lỗi là lỗi hoặc lỗi trong một chương trình. Nó có thể là một số loại. Lỗi có thể xảy ra do sai cú pháp hoặc sai logic. Đó là một loại lỗi hoặc tình trạng hiểu biết sai về mã

Có nhiều loại lỗi khác nhau trong PHP nhưng về cơ bản có bốn loại lỗi chính

1. Lỗi phân tích cú pháp hoặc Lỗi cú pháp. Là loại lỗi do người lập trình thực hiện trong mã nguồn của chương trình. Lỗi cú pháp được bắt bởi trình biên dịch. Sau khi sửa lỗi cú pháp, trình biên dịch sẽ biên dịch mã và thực thi nó. Lỗi phân tích cú pháp có thể do dấu ngoặc kép không đóng, dấu ngoặc đơn bị thiếu hoặc thừa, dấu ngoặc nhọn không đóng, thiếu dấu chấm phẩy, v.v.
   Ví dụ.

   
   

   
   
   

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   2

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   4____45

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   0

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   1

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   7

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   9

   Lỗi

   PHP Parse error:  syntax error, unexpected '=' 
   in /home/18cb2875ac563160a6120819bab084c8.php on line 3
   

   Giải trình. Chương trình trên thiếu dấu $ ở dòng 3 nên báo lỗi

2. Lỗi nghiêm trọng. Đây là loại lỗi mà trình biên dịch PHP hiểu mã PHP nhưng nó nhận ra một chức năng không được khai báo. Điều này có nghĩa là chức năng được gọi mà không có định nghĩa của chức năng.
   Ví dụ.

   
   

   
   
   

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   2

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   1

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   2

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   5

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   7

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   7

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   8

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   9

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   50

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   4

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   53

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   7

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   9

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   58

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   59

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   50

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   32

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   34

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   7

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   36

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   3______43____75______07

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   21

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   1

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   23

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3____75______07

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   21

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   9

   Lỗi

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   Giải trình. Ở dòng 12, hàm được gọi nhưng không có định nghĩa hàm. Vì vậy, nó đưa ra lỗi

3. Lỗi Cảnh báo. Lý do chính của lỗi cảnh báo bao gồm một tệp bị thiếu. Điều này có nghĩa là hàm PHP gọi tệp bị thiếu.
   Ví dụ.

   
   

   
   
   

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   29

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   1

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   4

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   33

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   1

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   36

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   37____438

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   21

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   1

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   3

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   59____444

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   6

   PHP Fatal error:  Uncaught Error: 
   Call to undefined function diff() 
   in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php:12
   
   Stack trace:
   #0 {main}
     thrown in /home/36db1ad4634ff7deb7f7347a4ac14d3a.php on line 12
   

   9

   Lỗi

   PHP Warning:  include(gfg.php): failed to 
   open stream: No such file or directory in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   PHP Warning:  include(): Failed opening 'gfg.php'
    for inclusion (include_path='.:/usr/share/php') in 
   /home/aed0ed3b35fece41022f332aba5c9b45.php on line 5
   

   Giải trình. Chương trình này gọi một tệp không xác định gfg. php không có sẵn. Vì vậy, nó tạo ra lỗi

   Sự khác biệt giữa thông báo và cảnh báo trong PHP là gì?

   THÔNG BÁO. Đó là một thông điệp để nói những gì bạn nên làm và những gì bạn không nên làm. CẢNH BÁO. Nó xảy ra trong thời gian chạy. Nhưng nó không làm gián đoạn quá trình thực thi Mã . LỖI. Nó cũng xảy ra trong thời gian chạy, nhưng việc thực thi chương trình không được tiếp tục, nó sẽ kết thúc.

   Làm cách nào để tránh cảnh báo trong PHP?

   Bạn có thể đặt @ trước lệnh gọi hàm của mình để chặn tất cả các thông báo lỗi .

   Có bao nhiêu mức cảnh báo điện tử trong PHP?

   Có bao nhiêu cấp độ lỗi trong PHP? . Các lỗi này đại diện cho danh mục và đôi khi là mức độ nghiêm trọng của lỗi trong PHP. 16 error levels in PHP 5. These errors represent the category and sometimes severity of an error in PHP.

   Ý nghĩa của E_error và E_warning trong PHP là gì?

   Điều này giống như một E_WARNING, ngoại trừ nó được tạo ra bởi Zend Scripting Engine. 256. E_USER_ERROR (int) Thông báo lỗi do người dùng tạo. Điều này giống như một E_ERROR, ngoại trừ nó được tạo ra trong mã PHP bằng cách sử dụng hàm trigger_error() của PHP