3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr[] = ["attribute" => "Paper Material","specification" => "Gloss Art Card 250 gsm"]; $arr[] = ["attribute" => "Paper Material","specification" => "Gloss Art Card 310 gsm"]; $arr[] = ["attribute" => "Orientation","specification" => "Portrait"]; $arr[] = ["attribute" => "Orientation","specification" => "Landscape"]; $arr[] = ["attribute" => "Lamination","specification" => "Not Required"]; foreach($arr as $e) { $dataArray[$e["attribute"]][] = $e["specification"]; } print_r($dataArray);
Output for 7.1.25 - 7.1.30, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [Paper Material] => Array ( [0] => Gloss Art Card 250 gsm [1] => Gloss Art Card 310 gsm ) [Orientation] => Array ( [0] => Portrait [1] => Landscape ) [Lamination] => Array ( [0] => Not Required ) )

preferences:
127.59 ms | 404 KiB | 170 Q