WordPress: List all hooks for a filter/action

gistfile1.txt

function dump_hook( $tag, $hook ) {
    ksort($hook);

    echo "<pre>>>>>>\t$tag<br>";

    foreach( $hook as $priority => $functions ) {

  echo $priority;

	foreach( $functions as $function )
	    if( $function['function'] != 'list_hook_details' ) {

		echo "\t";

		if( is_string( $function['function'] ) )
		    echo $function['function'];

		elseif( is_string( $function['function'][0] ) )
		     echo $function['function'][0] . ' -> ' . $function['function'][1];

		elseif( is_object( $function['function'][0] ) )
		    echo "(object) " . get_class( $function['function'][0] ) . ' -> ' . $function['function'][1];

		else
		    print_r($function);

		echo ' (' . $function['accepted_args'] . ') <br>';
		}
    }

    echo '</pre>';
}

function list_hooks( $filter = false ){
	global $wp_filter;

	$hooks = $wp_filter;
	ksort( $hooks );

	foreach( $hooks as $tag => $hook )
	    if ( false === $filter || false !== strpos( $tag, $filter ) )
			dump_hook($tag, $hook);
}

// Output the hooks. Leave the filter blank and it outputs all hooks.
list_hooks( $filter );