- substr: documentation ( source)
- array_map: documentation ( source)
- array_multisort: documentation ( source)
- var_export: documentation ( source)
<?php
$donuts[0] = "Chocolate 02";
$donuts[1] = "Jelly 16";
$donuts[2] = "Glazed 01";
$donuts[3] = "Frosted 12";
array_multisort(array_map(fn($v) => substr($v, -2), $donuts), $donuts);
var_export($donuts);