How does the scope of variables differ from class variables in PHP, and how does this impact the ability to call static methods using the double colon operator?

The scope of variables in PHP determines where they can be accessed within a script, while class variables are accessible throughout the class. When calling static methods using the double colon operator, the scope resolution operator, it is important to note that static methods can only access static properties and methods within the same class. To ensure that static methods can be called successfully, make sure to define the properties or methods as static within the class. 

class MyClass {
    public static $myVar = 'Hello';

    public static function myMethod() {
        return self::$myVar;
    }
}

echo MyClass::myMethod(); // Output: Hello

Keywords

Scope Variables Class variables Static methods Double colon operator

Related Questions