Get WordPress filters attach to specific hook

the_filters

                      
 /**
  * get filters attach to specific hook
  * eg. the_filters("the_title");
  */
 function the_filters($hook = '') {
    global $wp_filter;
    if (empty($hook) || !isset($wp_filter[$hook]))
        return;
    echo '<pre>';
    print_r(  $wp_filter[$hook] );
    echo '</pre>';
}