loop_start action-hook . WP 2.0.0

Fires once the loop is started.

Usage

add_action( 'loop_start', 'action_function_name_4640' );
function action_function_name_4640( $this ){
	// action...
}

$this(WP_Query)

The WP_Query instance (passed by reference).

Where the hook is called

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

Where the hook is used (in WP core)