/**
* Attempts to return a concrete IDNA instance for either php4 or php5,
* only creating a new instance if no IDNA instance with the same
* parameters currently exists.
*
* @param array $params Set of paramaters
* @return object IDNA The newly created concrete Log instance, or an
* false on an error.
* @access public
*/
function &singleton($params = array())
{
static $instances;
if (!isset($instances)) {
$instances = array();
}
$signature = serialize($params);
if (!isset($instances[$signature])) {
$instances[$signature] =& Net_IDNA::getInstance($params);
}
return $instances[$signature];
}
/**
* Determine if given domain or address literal is valid
* eg for use in JIDs and URLs. Does not check if the domain
* exists!
*
* @param string $domain
* @return boolean valid or not
*/
function common_valid_domain($domain)
{
$octet = "(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])";
$ipv4 = "(?:{$octet}(?:\\.{$octet}){3})";
if (preg_match("/^{$ipv4}\$/u", $domain)) {
return true;
}
$group = "(?:[0-9a-f]{1,4})";
$ipv6 = "(?:\\[({$group}(?::{$group}){0,7})?(::)?({$group}(?::{$group}){0,7})?\\])";
// http://tools.ietf.org/html/rfc3513#section-2.2
if (preg_match("/^{$ipv6}\$/ui", $domain, $matches)) {
$before = explode(":", $matches[1]);
$zeroes = $matches[2];
$after = explode(":", $matches[3]);
if ($zeroes) {
$min = 0;
$max = 7;
} else {
$min = 1;
$max = 8;
}
$explicit = count($before) + count($after);
if ($explicit < $min || $explicit > $max) {
return false;
}
return true;
}
try {
require_once "Net/IDNA.php";
$idn = Net_IDNA::getInstance();
$domain = $idn->encode($domain);
} catch (Exception $e) {
return false;
}
$subdomain = "(?:[a-z0-9][a-z0-9-]*)";
// @fixme
$fqdn = "(?:{$subdomain}(?:\\.{$subdomain})*\\.?)";
return preg_match("/^{$fqdn}\$/ui", $domain);
}
<?php
header('Content-Type: text/html; charset=UTF-8');
require 'Net/IDNA.php';
$idn = Net_IDNA::getInstance();
if (isset($_REQUEST['encode'])) {
$decoded = isset($_REQUEST['decoded']) ? $_REQUEST['decoded'] : '';
try {
$encoded = $idn->encode($decoded);
} catch (Exception $e) {
/* just swallow */
}
}
if (isset($_REQUEST['decode'])) {
$encoded = isset($_REQUEST['encoded']) ? $_REQUEST['encoded'] : '';
try {
$decoded = $idn->decode($encoded);
} catch (Exception $e) {
/* just swallow */
}
}
if (!isset($encoded)) {
$encoded = '';
}
if (!isset($decoded)) {
$decoded = '';
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
