- substr: documentation ( source)
- define: documentation ( source)
- md5: documentation ( source)
<?php
define('DB_PASSWORD', 'asdaspdsa;ldkjas;ld');
echo substr( md5( md5( DB_PASSWORD ) ), -5 );
echo substr( md5( md5( DB_PASSWORD ) ), -5 );
echo substr( md5( md5( DB_PASSWORD ) ), -5 );