Online PHP editor | output for kPpt4

<?php $list = array( array( 'order_cart_id' => 1, ), array( 'order_cart_id' => 2, ), array( 'order_cart_id' => 3, ), array( 'order_cart_id' => 4, ), ); for ($f = 1; $f <= 100000; $f++) { $carts = array(); foreach($list as $i => $item) { if(!empty($item['order_cart_id'])) { $carts[$i] = (int) $item['order_cart_id']; } } }