As of PHP 5.3, PHP-powered software is safe. Using is_numeric('١٣٦٨') // -> false preg_match('/\d/', '١٣٦٨') // -> no match / false filter_var('١٣٦

As of PHP 5.3, PHP-powered software is safe. Using is_numeric('١٣٦٨') // -> false preg_match('/\d/', '١٣٦٨') // -> no match / false filter_var('١٣٦٨', FILTER_VALIDATE_INT) // -> false Which I'm thankful for. I should hope that most people understand base-10 and ascii numbers. I don't want to have to worry about properly validating/handling unicode characters with number parsing.