Online PHP editor | output for WZKLB

<?php $arr =array( "20" => Array ( "ean" => "**6900532615069**", "productPrice" => 1140, "productCount" => 50 ), "15" => Array ( "ean" => "**6900532615069**", "productPrice" => 1140, "productCount" => 5 ), "25" => Array ( "ean" => 6900535364122, "productPrice" => 1140, "productCount" => 50 ), "36" => Array ( "ean" => "**6900532615069**", "productPrice" => 1140, "productCount" => 10, )); usort($arr, function ($a, $b) { return $b['productCount'] - $a['productCount']; }); $arr = array_values(array_column($arr, NULL, "ean")); var_dump($arr);