- substr: documentation ( source)
- base64_encode: documentation ( source)
- md5: documentation ( source)
<?php
$password = 19721972;
$password = substr(md5($password), 0, 16);
$password = base64_encode($password);
echo $password . " | " . strlen("Y2ZjMmMwZTBlY2Y3ZDg1Zg==");
?>