Sivamanim/Sum values of multidimensional array by key without loop

## Sum values of multidimensional array by key without loop
// PHP 5.5+

$items = array(
	 array('cost' => 2),
	 array('cost' => 3),
   array('cost' => 5)
);

echo array_sum(array_column($items, 'cost')); // output 10
	// PHP 5.5+

	$items = array(
	array('cost' => 2),
	array('cost' => 3),
	array('cost' => 5)
	);

	echo array_sum(array_column($items, 'cost')); // output 10