code: public static function deleteDir ($dir)
  	{
  		if (!is_dir($dir)) {
  			return FALSE;
  		}
  
  		$dh = opendir($dir);
  		while ($file = readdir($dh)) {
  			if ($file != "." && $file != "..") {
  				$full_path = $dir . "/" . $file;
  				if (!is_dir($full_path)) {
  					unlink($full_path);
  				}
  				else {
  					self::delete_dir($full_path);
  				}
  			}
  		}
  		closedir($dh);
  		if (rmdir($dir)) {
  			return TRUE;
  		}
  		else {
  			return FALSE;
  		}
  	}
docs: 删除目录
  
  @param $dir
  
  @return bool