public static function encode($value, $key = null)
{
if ($key == null) {
$key = Encryption::$skey;
} else {
$key = pack('H*', $key);
}
if (!$value) {
return false;
}
$text = $value;
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_ECB, $iv);
return trim(Encryption::safe_b64encode($crypttext));
}
