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@ 2014-06-25T21:29:04Z

<?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){
    return (!empty($cart['order_cart_id'])) ? (int) $cart['order_cart_id'] : NULL;
}, $list));

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
array_filter: documentation ( source)

preferences:dark modelive preview

37.69 ms | 402 KiB | 5 Q