从多维数组中提取值并放置在逗号分隔的字符串中 [英] Extract value from multidimensional array and place in comma separated string

问题描述

 数组
（
 [1] => ;数组
（
 [name] => Zeze 
 [city] => Denver，
 [state] => Colorado，
 [country] = > United States 
 [user_id] => 1 
 [cars] => Array 
（
 [140] => Array 
（
 [cars_name] => BMW 
）
 
 [162] =>阵列
（
 [cars_name] =>马自达
）
 
 
 $ b [8] =>数组
（
 [name] => Lex 
 [city] => Schwelm，
 [state] => North Rhine-Westphalia，
 [country] => Germany 
 [user_id] => 5 
 [cars] =>阵列
（
 [140] =>阵列
（
 [cars_name] =>奔驰
）
 
 [162] = >阵列
（
 [cars_name] =>奥迪
）
）
）
）
  

我需要从 user_id 中提取值，并将其放在逗号分隔的字符串中。

对于上面的数组，我想得到：

1,5 code

我有点困惑如何使用 foreach 来循环这个数组，然后如何我创建的字符串？或者有没有更好的方法？


解决方案

  $ uids = Array（）; 
 foreach（$ users as $ u）$ uids [] = $ u ['user_id']; 
 $ list = implode（，，$ uids）; 
  

假设你的数组被命名为 $ users 和 $ list 是输出。

I have an array that looks like this

Array
(
    [1] => Array
        (
            [name] => Zeze
            [city] => Denver, 
            [state] => Colorado, 
            [country] => United States
            [user_id] => 1
            [cars] => Array
                (
                    [140] => Array
                        (
                            [cars_name] => BMW
                        )

                    [162] => Array
                        (
                            [cars_name] => Mazda
                        )
                )
        )

    [8] => Array
        (
            [name] => Lex
            [city] => Schwelm, 
            [state] => North Rhine-Westphalia, 
            [country] => Germany
            [user_id] => 5
            [cars] => Array
                (
                    [140] => Array
                        (
                            [cars_name] => Mercedes
                        )

                    [162] => Array
                        (
                            [cars_name] => Audi
                        )
                )
        )
)

I need to extract the value from user_id and put it in a comma separated string.

For the above array, I would like to get:

1,5

I'm a bit confused how to loop this array with foreach and then how would I create the string? Or is there a better way?

解决方案

$uids = Array();
foreach($users as $u) $uids[] = $u['user_id'];
$list = implode(",",$uids);

This is assuming your array is named $users and $list is the output.

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