Static Method

Static methods are methods defined with the static keyword. They have to be called with the name of the class, rather than instantiated object.

<?php

class x {
    static function foo() {
        echo __METHOD__;
    }
}

//displays x::foo
x::foo();

?>

Documentation

See also When to use static methods and When Should You (And Shouldn’t You) Use Static Methods in Laravel/PHP? A Practical Guide.

Related : Method, Named Constructors, Scope Resolution Operator ::, Static Class, Static Property, Testable