openvk/Web/Util/Validator.php

<?php

declare(strict_types=1);

namespace openvk\Web\Util;

use Chandler\Patterns\TSimpleSingleton;

class Validator
{
    use TSimpleSingleton;
    public 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");
    }

    public function telegramValid(string $telegram): bool
    {
        return (bool) preg_match("/^(?:t.me\/|@)?([a-zA-Z0-9_]{0,32})$/", $telegram);
    }

    public function passwordStrong(string $password): bool
    {
        return (bool) preg_match("/^(?=.*[A-Z])(?=.*[0-9])(?=.*[a-z]).{8,}$/", $password);
    }
}