openvk/Web/Util/Validator.php

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<?php declare(strict_types=1);
namespace openvk\Web\Util;
use Chandler\Patterns\TSimpleSingleton;
class Validator
{
function emailValid(string $email): bool
{
if(empty($email)) return false;
$email = trim($email);
[$user, $domain] = explode("@", $email);
if(is_null($domain)) return false;
if(iconv_strlen($user) > 64) return false;
$domain = idn_to_ascii($domain) . ".";
return checkdnsrr($domain, "MX");
}
function telegramValid(string $telegram): bool
{
return (bool) preg_match("/^(?:t.me\/|@)?([a-zA-Z0-9_]{0,32})$/", $telegram);
}
use TSimpleSingleton;
}