php删除指定目录的方法

<?php
/**
 * delete a file, or a folder and its contents 
 * (recursive algorithm)
 * @author aidan lister <aidan@php.net>
 * @version 1.0.3
 * @param string  $dirname directory to delete
 * @return bool returns true on success, false on failure
 */
function rmdirr($dirname)
{
 // sanity check
 if (!file_exists($dirname)) {
  return false;
 }
 // simple delete for a file
 if (is_file($dirname) || is_link($dirname)) {
  return unlink($dirname);
 }
 // loop through the folder
 $dir = dir($dirname);
 while (false !== $entry = $dir->read()) {
  // skip pointers
  if ($entry == '.' || $entry == '..') {
   continue;
  }
  // recurse
  rmdirr($dirname . directory_separator . $entry);
 }
 // clean up
 $dir->close();
 return rmdir($dirname);
}
?>