function getUrl()
{
$args = func_get_args();
$class = array_shift($args);
$request = Request::getCurrent();
return $request->getDispatcher()->reverse($class, $args);
}
static function getRandomBytes($len)
{
// XXX: Move this to a utility class
$windows = !strncasecmp(PHP_OS, 'WIN', 3);
if ($windows) {
if (function_exists('openssl_random_pseudo_bytes') && version_compare(PHP_VERSION, '5.3.4', '>=')) {
return openssl_random_pseudo_bytes($len);
}
// Looks like mcrypt_create_iv with MCRYPT_DEV_RANDOM is still
// unreliable on 5.3.6:
// https://bugs.php.net/bug.php?id=52523
if (function_exists('mcrypt_create_iv') && version_compare(PHP_VERSION, '5.3.7', '>=')) {
return mcrypt_create_iv($len);
}
} else {
if (function_exists('openssl_random_pseudo_bytes')) {
return openssl_random_pseudo_bytes($len);
}
static $fp = null;
if ($fp == null) {
$fp = @fopen('/dev/urandom', 'rb');
}
if ($fp) {
return fread($fp, $len);
}
if (function_exists('mcrypt_create_iv')) {
return mcrypt_create_iv($len, MCRYPT_DEV_URANDOM);
}
}
$request = Request::getCurrent();
$seed = microtime() . getmypid();
if ($request) {
$seed .= $request->getSettings()->get('SECRET_SALT');
}
if ($request && $request->session) {
$seed .= $request->session->getSessionKey();
}
$start = mt_rand(5, PHP_INT_MAX);
$output = '';
for ($i = $start; strlen($output) < $len; $i++) {
$output .= hash_hmac('sha1', $i, $seed, true);
}
return substr($output, 0, $len);
}
