PHP array_count_values与多维数组 [英] PHP array_count_values with multidimensional array

问题描述

我有这个数组：

Array ( 
    [0] => stdClass Object ( [id] => 123 [name] => Alex ) 
    [1] => stdClass Object ( [id] => 124 [name] => John ) 
    [2] => stdClass Object ( [id] => 123 [name] => Alex ) 
    [3] => stdClass Object ( [id] => 124 [name] => John) 
    [4] => stdClass Object ( [id] => 126 [name] => Paul )
 )

我想输出如下：

 Array ( 
    [0] => Array ( [id] => 123 [name] => Alex [count] = 2 ) 
    [1] => Array ( [id] => 124 [name] => John [count] = 2 ) 
    [2] => Array ( [id] => 126 [name] => Paul [count] = 1 )
  )

我尝试使用 array_count_values（$ array），但是没有工作。

I tried using array_count_values($array), but it doesn't work.

有什么办法解决这个问题吗？

Any ideas how to solve this?

推荐答案

您可以简单地使用 array_map 以及简单的 foreach 之类的

You can simply use array_map along with simple foreach like as

foreach(array_map("get_object_vars",$arr) as $val){
    $hash = $val['id'];
    if(isset($result[$hash])){
        $result[$hash]['count'] += $result[$hash]['count'];
    }else{
        $result[$hash] = $val;
        $result[$hash]['count'] = 1;
    }
}
print_r(array_values($result));

输出：

Array
(
    [0] => Array
        (
            [id] => 123
            [name] => Alex
            [count] => 2
        )

    [1] => Array
        (
            [id] => 124
            [name] => John
            [count] => 2
        )

    [2] => Array
        (
            [id] => 126
            [name] => Paul
            [count] => 1
        )

)

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