PHP-如何在数组内合并数组 [英] PHP - How to merge arrays inside array

问题描述

如何在php中合并n个数组.我的意思是我该如何做:
array_merge(from : $result[0], to : $result[count($result)-1])
或
array_merge_recursive(from: $result[0], to : $result[count($result) -1])

How to merge n number of array in php. I mean how can I do the job like :
array_merge(from : $result[0], to : $result[count($result)-1])
OR
array_merge_recursive(from: $result[0], to : $result[count($result) -1])

$result是其中包含多个数组的数组，如下所示:

Where $result is an array with multiple arrays inside it like this :

$result = Array(
0 => array(),//associative array
1 => array(),//associative array
2 => array(),//associative array
3 => array()//associative array
)

我的结果是:

$result = Array(
    0 => Array(
        "name" => "Name",
        "events" => 1,
        "types" => 2
    ),
    1 => Array(
        "name" => "Name",
        "events" => 1,
        "types" => 3
    ),
    2 => Array(
        "name" => "Name",
        "events" => 1,
        "types" => 4
    ),
    3 => Array(
        "name" => "Name",
        "events" => 2,
        "types" => 2
    ),
    4 => Array(
        "name" => "Name",
        "events" => 3,
        "types" => 2
    )
)

我需要的是

$result = Array(
"name" => "name",
"events" => array(1,2,3),
"types" => array(2,3,4)
)

推荐答案

array_merge 可以参数的数量可变，因此只需 call_user_func_array 技巧，您就可以传递$result数组:

array_merge can take variable number of arguments, so with a little call_user_func_array trickery you can pass your $result array to it:

$merged = call_user_func_array('array_merge', $result);

这基本上就像您输入以下内容一样运行:

This basically run like if you would have typed:

$merged = array_merge($result[0], $result[1], .... $result[n]);

更新:

现在有了5.6，我们有了 ...运算符将数组解压缩为参数，因此您可以:

Update:

Now with 5.6, we have the ... operator to unpack arrays to arguments, so you can:

$merged = array_merge(...$result);

并且具有相同的结果. *

And have the same results. *

*只要在解压缩数组中具有整数键，结果相同，否则会出现E_RECOVERABLE_ERROR : type 4096 -- Cannot unpack array with string keys错误.

* The same results as long you have integer keys in the unpacked array, otherwise you'll get an E_RECOVERABLE_ERROR : type 4096 -- Cannot unpack array with string keys error.

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