遍历JSON对象属性
[英]Looping through JSON object properties
问题描述
I'm totally newbie what comes to programming so i'm not even quite sure if my terms are right but i would like to get some hints and tips what is best practice to loop through JSON object? 
我完全是编程方面的新手，所以我什至不确定我的术语是否正确，但是我想获得一些提示和技巧，这是遍历JSON对象的最佳实践是什么？ Let's say i want all game names from following JSON print_r output. 假设我想要来自以下JSON print_r输出的所有游戏名称。
stdClass Object
(
[_total] => 555
[_links] => stdClass Object
(
[self] => https://api.twitch.tv/kraken/games/top?limit=2&offset=0
[next] => https://api.twitch.tv/kraken/games/top?limit=2&offset=2
)
[top] => Array
(
[0] => stdClass Object
(
[viewers] => 86386
[channels] => 1159
[game] => stdClass Object
(
[name] => League of Legends
[_id] => 21779
[giantbomb_id] => 24024
[box] => stdClass Object
(
[template] => http://static-cdn.jtvnw.net/ttv-boxart/League%20of%20Legends-{width}x{height}.jpg
[small] => http://static-cdn.jtvnw.net/ttv-boxart/League%20of%20Legends-52x72.jpg
[medium] => http://static-cdn.jtvnw.net/ttv-boxart/League%20of%20Legends-136x190.jpg
[large] => http://static-cdn.jtvnw.net/ttv-boxart/League%20of%20Legends-272x380.jpg
)
[logo] => stdClass Object
(
[template] => http://static-cdn.jtvnw.net/ttv-logoart/League%20of%20Legends-{width}x{height}.jpg
[small] => http://static-cdn.jtvnw.net/ttv-logoart/League%20of%20Legends-60x36.jpg
[medium] => http://static-cdn.jtvnw.net/ttv-logoart/League%20of%20Legends-120x72.jpg
[large] => http://static-cdn.jtvnw.net/ttv-logoart/League%20of%20Legends-240x144.jpg
)
[_links] => stdClass Object
(
)
)
)
[1] => stdClass Object
(
[viewers] => 17288
[channels] => 162
[game] => stdClass Object
(
[name] => Hearthstone: Heroes of Warcraft
[_id] => 138585
[giantbomb_id] => 42033
[box] => stdClass Object
(
[template] => http://static-cdn.jtvnw.net/ttv-boxart/Hearthstone%3A%20Heroes%20of%20Warcraft-{width}x{height}.jpg
[small] => http://static-cdn.jtvnw.net/ttv-boxart/Hearthstone%3A%20Heroes%20of%20Warcraft-52x72.jpg
[medium] => http://static-cdn.jtvnw.net/ttv-boxart/Hearthstone%3A%20Heroes%20of%20Warcraft-136x190.jpg
[large] => http://static-cdn.jtvnw.net/ttv-boxart/Hearthstone%3A%20Heroes%20of%20Warcraft-272x380.jpg
)
[logo] => stdClass Object
(
[template] => http://static-cdn.jtvnw.net/ttv-logoart/Hearthstone%3A%20Heroes%20of%20Warcraft-{width}x{height}.jpg
[small] => http://static-cdn.jtvnw.net/ttv-logoart/Hearthstone%3A%20Heroes%20of%20Warcraft-60x36.jpg
[medium] => http://static-cdn.jtvnw.net/ttv-logoart/Hearthstone%3A%20Heroes%20of%20Warcraft-120x72.jpg
[large] => http://static-cdn.jtvnw.net/ttv-logoart/Hearthstone%3A%20Heroes%20of%20Warcraft-240x144.jpg
)
[_links] => stdClass Object
(
)
)
)
)
)
I can access single line (not sure if this is best practise either): 我可以访问单行（不确定这是否也是最佳实践）：
$OBJ->method()->top[0]->game->name;
But i'm more than clueless how to loop through all game names. 但是我绝不知道如何遍历所有游戏名称。
Any help much appreciated! 任何帮助，不胜感激！
3 个解决方案
解决方案1
2 2014-03-18 16:51:55
The "name"s are accessed using $OBJ->top[0]->game->name etc... So just foreach over the "top" array: 使用$OBJ->top[0]->game->name等访问“名称” ...因此，只需foreach “ top”数组即可：
foreach($OBJ->top as $object) {
echo $object->game->name;
}
解决方案2
1 已采纳 2014-03-18 16:52:02
Create an empty array, loop the objects top array and fill your empty array: 创建一个空数组，将对象循环到顶部数组并填充您的空数组：
$allgames=array();
foreach($OBJ->method()->top as $ob){
$allgames[] = $ob->game->name;
}
解决方案3
1 2014-03-18 16:52:41
When you load your JSON string into PHP you can use: 将JSON字符串加载到PHP中时，可以使用：
json_decode($string_of_json, true);
The true flag will load it into an array you can loop through using, for example, foreach . true标志会将其加载到可以使用例如foreach循环进行遍历的数组中。
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