WordPress add_action() Object method callback


Example

class MyClass {
    function my_init_method() {
        // do something here
    }
}

$obj = new MyClass();

add_action( 'init', array( $obj, 'my_init_method' ) );

Using a method of an object to hook a set of instructions. With the init hook, the set of instructions will be executed right after wordpress has finished loading the necessary components.