- var_dump: documentation ( source)
- implode: documentation ( source)
- pack: documentation ( source)
- array_walk: documentation ( source)
- str_split: documentation ( source)
<?php
$bla = str_split("test");
array_walk($bla, function(&$v, $k) {$v = pack("c",$v);});
echo var_dump(implode($bla));