使用相同的键合并数组 [英] Merging arrays with the same keys

问题描述

在一个软件中，我用array_merge函数合并了两个数组.但是我需要将相同的数组(当然，具有相同的键)添加到现有数组中.

In a piece of software, I merge two arrays with array_merge function. But I need to add the same array (with the same keys, of course) to an existing array.

问题:

 $A = array('a' => 1, 'b' => 2, 'c' => 3);
 $B = array('c' => 4, 'd'=> 5);

 array_merge($A, $B);

 // result
 [a] => 1 [b] => 2 [c] => 4 [d] => 5

如您所见，缺少'c' => 3.

那我该如何用相同的键合并所有这些?

So how can I merge all of them with the same keys?

推荐答案

您需要使用 array_merge_recursive 而不是array_merge.当然，数组中只能有一个与'c'相等的键，但是关联的值将是同时包含3和4的数组.

You need to use array_merge_recursive instead of array_merge. Of course there can only be one key equal to 'c' in the array, but the associated value will be an array containing both 3 and 4.

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