PHPFusion\LostPassword::_isValidEMailAddress PHP Метод

    private function _isValidEMailAddress($email)
    {
        $email = stripinput(trim(preg_replace("/ +/i", "", $email)));
        if (preg_match("/^[-0-9A-Z_\\.]{1,50}@([-0-9A-Z_\\.]+\\.){1,50}([0-9A-Z]){2,4}\$/i", $email)) {
            $check = dbcount("(user_id)", DB_USERS, "user_email='" . $email . "'");
            if ($check > 0) {
                $this->_userEMail = $email;
                return TRUE;
            } else {
                // e-mail adress is not found
                $this->_error = 1;
                return FALSE;
            }
        } else {
            // no valid e-mail adress
            $this->_error = 2;
            return FALSE;
        }
    }