如何递归合并两个多维阵列

Question

$var1=array();
$myInputVar=array();
$var1['something']['secondary_something'][]="foo1";
$var1['something']['secondary_something'][]="foo2";
$var1['something']['secondary_something'][]="foo3";

$myInputVar['something']['secondary_something'][]="foo4";
$myInputVar['something']['secondary_something'][]="foo5";

function something(&$array_, $array_new) {
   $array = array_merge($array_ , $array_new); 

    print_r($array);//for debugging

}   
something($var1, $myInputVar);

现在打印：Array ( [something] => Array ( [secondary_something] => Array ( [0] => foo1 [1] => foo2 [2] => foo3 ) ) )

当我期待：Array ( [something] => Array ( [secondary_something] => Array ( [0] => foo1 [1] => foo2 [2] => foo3 [3] => foo4 [4] => foo5) ) )

我也尝试了：

$array = $array_ + $array_new;

仍然没有打印我的期望。 我有一种感觉，我误解了

array_merge()

功能的目的，这就是为什么它不返回结果我期望它会返回的结果。

任何想法？

array_merge_recursive()

将从从左到右工作。在您的情况下：

Answer 1

array_merge

将被

$array_['something']['secondary_something'] 您可以做以下操作：

Answer 2

，否则，您需要创建一个函数，该函数了解关联密钥并将适当地组合数组。

function something(&$array_, $array_new) {
    $array = array_merge($array_ , $array_new); 
    return $array;
}

$var1['something']['secondary_something'] = something($var1['something']['secondary_something'], $myInputVar['something']['secondary_something']);