Spoofchecker example

        if (!extension_loaded('intl')) {
            throw new \LogicException(sprintf('The %s class requires the Intl extension.', __CLASS__));
        }
    }

    /** * @psalm-suppress InvalidArgument */
    public function isValid(string $email, EmailLexer $emailLexer) : bool
    {
        $checker = new Spoofchecker();
        $checker->setChecks(Spoofchecker::SINGLE_SCRIPT);

        if ($checker->isSuspicious($email)) {
            $this->error = new SpoofEmail();
        }

        return $this->error === null;
    }

    /** * @return InvalidEmail */

return;
        }

        if (!\is_scalar($value) && !$value instanceof \Stringable) {
            throw new UnexpectedValueException($value, 'string');
        }

        if ('' === $value = (string) $value) {
            return;
        }

        $checker = new \Spoofchecker();
        $checks = $constraint->checks;

        if (method_exists($checker, 'setRestrictionLevel')) {
            $checks |= self::CHECK_RESTRICTION_LEVEL;
            $checker->setRestrictionLevel($constraint->restrictionLevel ?? NoSuspiciousCharacters::RESTRICTION_LEVEL_MODERATE);
        } elseif (NoSuspiciousCharacters::RESTRICTION_LEVEL_MINIMAL === $constraint->restrictionLevel) {
            $checks |= self::CHECK_CHAR_LIMIT;
        } elseif (NoSuspiciousCharacters::RESTRICTION_LEVEL_SINGLE_SCRIPT === $constraint->restrictionLevel) {
            $checks |= self::CHECK_SINGLE_SCRIPT | self::CHECK_CHAR_LIMIT;
        } elseif ($constraint->restrictionLevel) {
            throw new LogicException('You can only use one of RESTRICTION_LEVEL_NONE, RESTRICTION_LEVEL_MINIMAL or RESTRICTION_LEVEL_SINGLE_SCRIPT with intl compiled against ICU < 58.');
        }

return;
        }

        if (!\is_scalar($value) && !$value instanceof \Stringable) {
            throw new UnexpectedValueException($value, 'string');
        }

        if ('' === $value = (string) $value) {
            return;
        }

        $checker = new \Spoofchecker();
        $checks = $constraint->checks;

        if (method_exists($checker, 'setRestrictionLevel')) {
            $checks |= self::CHECK_RESTRICTION_LEVEL;
            $checker->setRestrictionLevel($constraint->restrictionLevel ?? NoSuspiciousCharacters::RESTRICTION_LEVEL_MODERATE);
        } elseif (NoSuspiciousCharacters::RESTRICTION_LEVEL_MINIMAL === $constraint->restrictionLevel) {
            $checks |= self::CHECK_CHAR_LIMIT;
        } elseif (NoSuspiciousCharacters::RESTRICTION_LEVEL_SINGLE_SCRIPT === $constraint->restrictionLevel) {
            $checks |= self::CHECK_SINGLE_SCRIPT | self::CHECK_CHAR_LIMIT;
        } elseif ($constraint->restrictionLevel) {
            throw new LogicException('You can only use one of RESTRICTION_LEVEL_NONE, RESTRICTION_LEVEL_MINIMAL or RESTRICTION_LEVEL_SINGLE_SCRIPT with intl compiled against ICU < 58.');
        }