wp action-hook . WP 2.1.0

Fires once the WordPress environment has been set up.

Usage

add_action( 'wp', 'action_function_name_455' );
function action_function_name_455( $this ){
	// action...
}

$this(WP)

Current WordPress environment instance (passed by reference).

Where the hook is called

do_action_ref_array( 'wp', array( &$this ) );

Where the hook is used (in WP core)

add_action( 'wp', array( $this, 'customize_register' ) );