array_replace_recursive不会将数组替换为空数组

问题描述

我遇到了问题.这是我的代码:

I've got the problem. Here is my code:

$a = ['elm1' => 1, 'elm2' => []];
$b = ['elm1' => 2, 'elm2' => [3]];
$c = array_replace_recursive($b, $a);

在$ c中，我希望看到 ['elm1'=> 1，'elm2'=> []] ，但是我得到 ['elm1'=> 1，'elm2'=> [3]] .不会将'elm2'=> [3] 替换为'elm2'=> [] .

In $c I expect to see ['elm1' => 1, 'elm2' => []], however I get ['elm1' => 1, 'elm2' => [3]]. It does not replace 'elm2' => [3] with 'elm2' => [].

这是某种功能还是在array_replace_recursive中存在错误?

Is this some kind of feature or this is a bug in array_replace_recursive?

谢谢.

推荐答案

使用 array_merge():-

<?php

$a = ['elm1' => 1, 'elm2' => []];
$b = ['elm1' => 2, 'elm2' => [3]];
$c = array_merge($b,$a); //it will check the indexes in both array and if indexes are same then first array value will remain on that index second will replace. 

echo "<pre/>";print_r($c);
?>

输出:- https://eval.in/395368

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