Online PHP editor | refs for Y25C2

<?php $arrays = [ [ "id" => 1, "order_id" => 1, "image_url" => "/resources/filename1" ], [ "id" => 2, "order_id" => 1, "image_url" => "/resources/filename2" ], [ "id" => 3, "order_id" => 1, "image_url" => "/resources/filename3" ], [ "id" => 4, "order_id" => 2, "image_url" => "/resources/filename4" ], ]; foreach($arrays as $array) { if(!isset($result[$array['order_id']]['id'])) { $result[$array['order_id']]['id']=$array['id']; } $result[$array['order_id']]['order_id']=$array['order_id']; $result[$array['order_id']]['image_url'][]=$array['image_url']; } print_r($result);