- var_dump: documentation ( source)
- array_udiff: documentation ( source)
<?php
$items = array("abc", "cde");
$udiff = array_udiff($items, $items, function ($a, $b) {
$result = $a === $b;
print("Comparing $a to $b, result is $result\n");
return $result;
});
var_dump($udiff);