- bin2hex: documentation ( source)
- pack: documentation ( source)
<?php
echo bin2hex(pack('nnNNN',
0xda1a, // magic for validation
intval(1) & 0xFFFF, // typeid
intval(1) & 0xFFFFFFFF, // splitid
5000 >> 32, 5000 & 0xFFFFFFFF // actual item id
));