1. Go to this page and download the library: Download ixnode/php-iban library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
ixnode / php-iban example snippets
use Ixnode\PhpIban\Iban;
use Ixnode\PhpIban\Validator;
...
$iban = 'DE02120300000000202051';
$validator = new Validator(new Iban($iban));
print $validator->isValid() ? 'YES' : 'NO';
// (string) YES
print $validator->getAccount()->getAccountNumber();
// (string) 0000202051
print $validator->getIban()->getIbanFormatted();
// (string) DE02 1203 0000 0000 2020 51
etc.