What is static variable in php
Tip Show This page describes the use of the Declaring class properties or methods as static makes them accessible without needing an instantiation of the class. These can also be accessed statically within an instantiated class object. Static methodsBecause static methods are callable without an instance of the object created, the pseudo-variable $this is not available inside methods declared as static. Warning Calling non-static methods statically throws an Error. Prior to PHP 8.0.0, calling non-static methods statically were deprecated, and generated an Example #1 Static method example
Static properties Static properties are accessed using the Scope Resolution Operator ( It's possible to reference the class using a variable. The variable's value cannot be a keyword (e.g. Example #2 Static property example
staticValue() { Output of the above example in PHP 8 is similar to: foo foo Notice: Accessing static property Foo::$my_static as non static in /in/V0Rvv on line 23 Warning: Undefined property: Foo::$my_static in /in/V0Rvv on line 23 foo foo foo foo inkredibl ¶ 14 years ago
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$test="class a"; artekpuck at gmail dot com ¶ 4 years ago
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staticparent { rahul dot anand77 at gmail dot com ¶ 6 years ago
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$variable; sideshowAnthony at googlemail dot com ¶ 6 years ago
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$_instance = NULL;/** webmaster at removethis dot weird-webdesign dot de ¶ 12 years ago
init($value) { self::$a = $value; } manishpatel2280 at gmail dot com ¶ 8 years ago
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a { use t; } zerocool at gameinsde dot ru ¶ 13 years ago
__construct() gratcypalma at gmail dot om ¶ 11 years ago
getInitial() { michalf at ncac dot torun dot pl ¶ 17 years ago
DerivedClassOne extends BaseClass{ Jay Cain ¶ 12 years ago
init() { Mirco ¶ 12 years ago
MyStaticClass valentin at balt dot name ¶ 12 years ago
get () { jkenigso at utk dot edu ¶ 8 years ago
$b::$a; //outputs 1 michael at digitalgnosis dot removethis dot com ¶ 17 years ago
Derived extends Base vvikramraj at yahoo dot com ¶ 14 years ago
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__construct() fakhar_anwar123 at hotmail dot com ¶ 2 years ago
What is static variable with example?The static variable can be used to refer to the common property of all objects (which is not unique for each object), for example, the company name of employees, college name of students, etc. The static variable gets memory only once in the class area at the time of class loading.
Does PHP have static variables?Introduction: A static class in PHP is a type of class which is instantiated only once in a program. It must contain a static member (variable) or a static member function (method) or both. The variables and methods are accessed without the creation of an object, using the scope resolution operator(::).
What is the use of static variable?Static variables are used to keep track of information that relates logically to an entire class, as opposed to information that varies from instance to instance.
What is static and final in PHP?final static declares a method which is static (can be called without an instance of the class) and final (can't be overridden by subclasses). static alone can be used to define a class-scoped variable, which isn't constant (but variables can't be final ).
What is difference between static and global variable in PHP?Global is used to get the global vars which may be defined in other scripts, or not in the same scope. e.g. Static is used to define an var which has whole script life, and init only once.
What is difference between static and constant in PHP?Constant is just a constant, i.e. you can't change its value after declaring. Static variable is accessible without making an instance of a class and therefore shared between all the instances of a class.
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