- array_map: documentation ( source)
- implode: documentation ( source)
- base64_encode: documentation ( source)
<?php
$item_id = array('49408625ZX06-07ZXZX2015ZXZX', '2015', '06-07');
echo "Separate args: " . implode('/', array_map('base64_encode', $item_id));
echo "\n";
echo " Joined args: " . base64_encode(implode('|', $item_id));