How can use static variable in class in PHP?

The static keyword is used to declare properties and methods of a class as static. Static properties and methods can be used without creating an instance of the class. The static keyword is also used to declare variables in a function which keep their value after the function has ended.

How can access public static variable in PHP?

Accessing the value of a static variable is similar to accessing for a class constant: You either use the type name (outside of or within the class) or the keyword self , both followed by the scope resolution operator ( :: ) and the name of the static variable, starting with $ .

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 are static variables PHP?

Outside of classes (ie: in functions), a static variable is a variable that doesn’t lose its value when the function exits.

What does :: in PHP mean?

Scope Resolution Operator
In PHP, the double colon :: is defined as Scope Resolution Operator. It used when when we want to access constants, properties and methods defined at class level. When referring to these items outside class definition, name of class is used along with scope resolution operator.

How can I access a class in PHP?

First you need an instance of the class. Then you call the method (if it’s public). You should read some OOP tutorials as this is really basic stuff. See Object Oriented PHP for Beginners.

How do you call a class object in PHP?

When calling a class constant using the $classname :: constant syntax, the classname can actually be a variable. As of PHP 5.3, you can access a static class constant using a variable reference (Example: className :: $varConstant).