- substr: documentation ( source)
- uniqid: documentation ( source)
- crypt: documentation ( source)
- str_replace: documentation ( source)
- strrev: documentation ( source)
- rand: documentation ( source)
<?php
$randomId = crypt(uniqid(rand(), 1));
$randomId = str_replace('.', '', $randomId);
$randomId = strrev(str_replace('/', '', $randomId));
$randomId = substr($randomId, 0, 10);
echo $randomId;