#Uniq ID multiple call # function uniqidReal($lenght = 13) { // uniqid gives 13 chars, but you could adjust it to your needs. if (function_exists("random_bytes")) { $bytes = random_bytes(ceil($lenght / 2)); } elseif (function_exists("openssl_random_pseudo_bytes")) { $bytes = openssl_random_pseudo_bytes(ceil($lenght / 2)); } else { throw new Exception("no cryptographically secure random function available"); } return substr(bin2hex($bytes), 0, $lenght); }