codeigniter-cache delete_all()

Cache.php

	/**
	 * Delete Full Cache or Cache subdir
     * Skips .htaccess and index.htm(l) files for security
	 *
	 * @access	public
	 * @param	string
	 * @return	void
	 */
	function delete_all($dirname = '')
	{
		if (empty($this->_path))
		{
			return FALSE;
		}

		$this->_ci->load->helper('file');
		if (file_exists($this->_path.$dirname))  {
            $files = scandir($this->_path.$dirname);
            foreach($files as $f) {
                if($f != '.' && $f != '..' && $f != '.htaccess' && strpos($f, 'index.htm') === false) {
                    $p = str_replace('\\','/', rtrim($this->_path.$dirname,DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR.$f);
                    if(is_dir($p)) {
                        delete_files($p, TRUE);
                        rmdir($p);
                    } else {
                        unlink($p);
                    }
                }
            }
        }

		// Reset values
		$this->_reset();
	}