array_replace_recursive()

(PHP 5 >= 5.3.0, PHP 7)

使用传递的数组递归替换第一个数组的元素

说明

array_replace_recursive()使用后面数组元素的值替换数组$array1的值。如果一个键存在于第一个数组同时也存在于第二个数组，它的值将被第二个数组中的值替换。如果一个键存在于第二个数组，但是不存在于第一个数组，则会在第一个数组中创建这个元素。如果一个键仅存在于第一个数组，它将保持不变。如果传递了多个替换数组，它们将被按顺序依次处理，后面的数组将覆盖之前的值。

array_replace_recursive()是递归的：它将遍历数组并将相同的处理应用到数组的内部值。

如果第一个数组中的值是标量，它的值将被第二个数组中的值替换，它可能是一个标量或者数组。如果第一个数组和第二个数组中的值都是数组，array_replace_recursive()函数将递归地替换它们各自的值。

参数

替换该数组的值。

可选项。包含要提取元素的数组。

返回值

返回一个数组。如果发生错误，将返回NULL。

范例

Example #1array_replace_recursive()范例

以上例程会输出：

Array
(
    [citrus] => Array
        (
            [0] => pineapple
        )
    [berries] => Array
        (
            [0] => blueberry
            [1] => raspberry
        )
)
Array
(
    [citrus] => Array
        (
            [0] => pineapple
        )
    [berries] => Array
        (
            [0] => blueberry
        )
)

Example #2array_replace_recursive()及其递归表现

以上例程会输出：

Array
(
    [citrus] => Array
        (
            [0] => pineapple
        )
    [berries] => Array
        (
            [0] => blueberry
            [1] => raspberry
        )
    [others] => litchis
)

参见

• array_replace() 使用传递的数组替换第一个数组的元素
• array_merge_recursive() 递归地合并一个或多个数组

Nice that this function finally found its was to the PHP core! If you want to use it also with older PHP versions before 5.3.0, you can define it this way:

I called this function array_merge_recursive_overwrite() in my older projects, but array_replace_recursive() sounds quite better while they do the same.
If you implemented such a compatible function before and don't want to refactor all your code, you can update it with the following snippet to use the native (and hopefully faster) implementation of PHP 5.3.0, if available. Just start your function with these lines: 

Note that the use of the word "replace" in the function's description is a bit misleading... as none of the parameters are passed by reference, it does not actually replace anything... this simply describes from which parameter the resulting values come.

This is a fairly concise version which does not rely on traditional recursion: 

This might help out people who don't have 5.3 running: 

If you came here looking for a function to recursively find and replace (scalar) values in an array (also recurses through objects): 

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