Online PHP editor | output for 5HT3Q

<?php $items_thread=Array ( [0] => Array ( [RecipientID] => 3 [RecipientScreenname] => Tom L [RecipientFirstname] => Thomas [RecipientEmail] => info@xx.com ) [1] => Array ( [RecipientID] => 3 [RecipientScreenname] => Tom L [RecipientFirstname] => Thomas [RecipientEmail] => info@xx.com ) [2] => Array ( [RecipientID] => 1 [RecipientScreenname] => Lau T [RecipientFirstname] => TK [RecipientEmail] => lau@xx.co.uk ) ) But I want to get rid of the duplicate items in the array, so I use array_unique print_r(array_unique($items_thread));