Online PHP editor | refs for n8SA1

<?php $a = [ ['value' => '150mm', 'label' => '150mm'], ['value' => '150mm', 'label' => '150mm'], ['value' => '150mm', 'label' => '150mm'], ['value' => '125mm', 'label' => '125mm'], ['value' => '125mm', 'label' => '125mm'] ]; $r = array_values(array_column($a, null, 'label')); print_r($r); /******** if you want to keep single column ******/ $r = array_values(array_column($a, 'value', 'label')); print_r($r);