Online PHP editor | refs for kWdOS

<?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++) { $carts = array_filter(array_map(function($cart){ return (!empty($cart['order_cart_id'])) ? (int) $cart['order_cart_id'] : NULL; }, $list)); }