- array_map: documentation ( source)
- print_r: documentation ( source)
- implode: documentation ( source)
- str_split: documentation ( source)
<?php
$a = array(10,1234,144,2,101,231,213);
$out = array_map(function ($v) {
return implode('/', str_split($v)) . "/$v.txt";
}, $a);
print_r($out);