function dn_unescape($dn) {
	if (DEBUG_ENABLED && (($fargs=func_get_args())||$fargs='NOARGS'))
		debug_log('Entered (%%)',1,0,__FILE__,__LINE__,__METHOD__,$fargs);

	if (is_array($dn)) {
		$a = array();

		foreach ($dn as $key => $rdn)
			$a[$key] = preg_replace_callback('/\\\([0-9A-Fa-f]{2})/', 'convertHexStringToCharCallback', $rdn);

		return $a;

	} else {
		return preg_replace_callback('/\\\([0-9A-Fa-f]{2})/', 'convertHexStringToCharCallback', $dn);
	}
}

/**
 * Converts a hex encoded string like \12 to the corresponding character.
 * 
 * @param array $hex preg_replace_callback: matching hex string array
 * @return String character
 */
function convertHexStringToCharCallback($hex) {
	return chr(hexdec($hex[1]));
}