在多维数组上运行php foreach循环。

Question

我需要在多维数组上运行一个foreach脚本。

原始的JSON格式如下：

{
    "_links":{

    },
    "chatter_count":15,
    "chatters":{
        "moderators":[
            "moderator1",
            "moderator2",
            "moderator3"
        ],
        "staff":[
            "staff1",
            "staff2",
            "staff3"
        ],
        "admins":[
            "admin1",
            "admin2",
            "admin3"
        ],
        "global_mods":[
            "global_mod1",
            "global_mod2",
            "global_mod3"
        ],
        "viewers":[
            "viewer1",
            "viewer2",
            "viewer3"
        ]
    }
}

在运行json_decode以获得PHP数据结构之后，我现在不知道如何运行foreach循环来输出以下内容：

chatter_count: 15 

moderators:
moderator1
moderator2
moderator3

staff:
staff1
staff2
staff3

admins:
admin1
admin2
admin3

global_mods:
global_mod1
global_mod2
global_mod3

viewers:
viewer1
viewer2
viewer3

Answer 1

首先将json解码为数组，然后使用$key打印数组：

<?php

$testobj = json_decode(file_get_contents('https://tmi.twitch.tv/group/user/sodapoppin/chatters'), true);

echo "chatter_count:".$testobj['chatter_count']."\n";

foreach($testobj['chatters'] as $key => $chatter){
    echo "\n$key:\n";
    foreach ($chatter as $value) {
        echo "$value\n";
    }
}

输出：

我从你给出的URL中得到了这样的信息：

chatter_count:5461

moderators:
emilydk
fyzicul
hnl
hnlbot
ngmack
nixi93
psychostatik
sodapoppin
staystrong420
sxyhxy
tastyphone

staff:
evoli
pluto
...
...
...

Answer 2

你离你想要完成的事情只有几步之遥。要获得chatter_count，请使用$testobj ->chatter_count。然后循环遍历chatters数组，使用foreach($testobj->chatters as $key => $value) { // write your logic here }。这样你就能得到你想要达到的目标。我可以在这里粘贴代码，但我希望你先试一试。希望你现在能得到提示。

Answer 3

$data = json_decode($json, true);
echo "chatter_count: " . $data["chatter_count"] . "\n";
foreach($data['chatters'] as $chattersK=> $chatters) {
  echo $chattersK . ":\n";
  foreach($chatters as $chatterK => $chatters) {
     echo $chatters . "\n";
  }
  echo "\n";
}

演示：Eval.in