Question

I’m using PHP as my programming language. I really don’t understand the use of static method and variables.

1. When a methold should be static?/ What methods should be static ?
2. How to identify what methold should be static?
3. Pros and Cons static method and variables ?

Thanks

Answer 1

Declaring class properties or methods as static makes them accessible without needing an instantiation of the class. A property declared as static can not be accessed with an instantiated class object

<?php class Foo {
    public static function aStaticMethod() {
        // ...
    } }

$classname = 'Foo'; $classname::aStaticMethod(); // ( PHP 5.3.0) ?> 

“it can be initiated with out an OBJECT”