Online PHP editor | refs for qvWWM

<?php $list = array( array( 'order_cart_id' => 1, ), array( 'order_cart_id' => 2, ), array( 'order_cart_id' => 3, ), array( 'order_cart_id' => 4, ), ); $carts = array_filter(array_map(function($cart){ if(!empty($cart['order_cart_id'])) { return (int) $cart['order_cart_id']; } else { return NULL; } }, $list));