黄聪：wordpress获取hook所有function

list_hooked_functions('wp_footer');

function list_hooked_functions($tag=false)
{
    global $wp_filter;

    if ($tag)
    {
        $hook[$tag]=$wp_filter[$tag];
        if (!is_array($hook[$tag]))
        {
            trigger_error("Nothing found for '$tag' hook", E_USER_WARNING);
            return;
        }
    }
    else
    {
        $hook=$wp_filter;
        ksort($hook);
    }

    echo '<pre>';
    foreach($hook as $tag => $priority)
    {
        echo "<br />>>>>>\t<strong>$tag</strong><br />";
        ksort($priority);
        foreach($priority as $priority => $function)
        {
            echo $priority;
            foreach($function as $name => $properties) echo "\t$name<br />";
        }
    }
    echo '</pre>';
    return;
}