Online PHP editor | refs for 1ZoT2

<?php $arr = Array ( '0' => Array ( 'pa_flavour' => 101 ), '1' => Array ( 'pa_flavour' => 102 ), '2' => Array ( 'pa_flavour' => 103 ), '3' => Array ( 'pa_flavour' => 104 ), '4' => Array ( 'pa_flavour' => 100 ), '5' => Array ( 'pa_bottle-size' => 108 ), '6' => Array ( 'pa_nicotine-strength' => 109 ), '7' => Array ( 'pa_nicotine-strength' => 110 ) ); $res = []; foreach($arr as $k => $v){ foreach ($v as $key => $value) { $res[$key][] = $value; } } print_r($res);