Php 如何添加这些阵列？

如何获得所有阵列的总订购数量之和

这可以是任意数量的数组

       Array ( [0] => Array ( [total_qty_ordered] => 1.0000 [1] => ) [1] => Array
     ( [total_qty_ordered] => 1.0000 [1] => ) [2] => Array ( [total_qty_ordered] => 1.0000
 [1] =>
     ) [3] => Array ( [total_qty_ordered] => 1.0000 [1] => ) [4] => Array ( 
[total_qty_ordered] =>
     1.0000 [1] => ) [5] => Array ( [total_qty_ordered] => 1.0000 [1] => ) [6] => Array (

    [total_qty_ordered] => 1.0000 [1] => ) [7] => Array ( [total_qty_ordered] => 1.0000 [1]
 => )
     [8] => Array ( [total_qty_ordered] => 1.0000 [1] => ) [9] => Array ( 
[total_qty_ordered] => 
    2.0000 [1] => ) [10] => Array ( [total_qty_ordered] => 1.0000 [1] => ) [11] => Array (
 [total_qty_ordered] => 1.0000 [1] => ) )

但如果数组结构真的是这样（第二个值真的是空的），您还可以执行以下操作：

$sum = array_sum(call_user_func_array('array_merge',
            array_map('array_values', $array)));

在PHP 5.5中，您可以执行以下操作：

 $sum = array_sum(array_col('total_qty_ordered', $array));

 $sum = array_sum(array_col('total_qty_ordered', $array));