- var_dump: documentation ( source)
- serialize: documentation ( source)
- array_filter: documentation ( source)
v<?php
$items = array(array(1 => 1), array(2 => 2), array(1 => 1));
$items = array_filter($items, function($item) {static $seen;
$serial = serialize($item); $retVal = !isset($seen[$serial]);
$seen[$serial] = TRUE; return $retVal;});
var_dump($items);