- substr: documentation ( source)
- ord: documentation ( source)
- md5: documentation ( source)
<?php
$num1 = ord(substr(md5('password'),5,1));
$num2 = ord(substr(md5('password'),10,1));
$num3 = substr(md5('password'), 3, 1);
$num4 = (ord('F')*100+ord('K'));
echo "$num1 - $num2 - $num3 -$num4";
?>