PHP script for recursive cleaning old files

clean_cache.php

<?php

function rrmdir($dir, $t) { 
  if (is_dir($dir)) { 
    $objects = scandir($dir); 
    foreach ($objects as $object) { 
      if ($object != "." && $object != "..") { 
        if (filetype($dir."/".$object) == "dir") {
            rrmdir($dir."/".$object, $t);
          } else {
            if (filemtime($dir."/".$object) < time() - $t) {
              unlink($dir."/".$object);
            }
          }
      } 
    } 
    reset($objects); 
  } 
}

rrmdir('cache', 86400);

?>