循环遍历JSON对象属性

Question

对于编程，我完全是新手，所以我甚至不确定我的条款是否正确，但是我想得到一些提示和提示，什么是最佳实践来循环JSON对象？假设我希望所有游戏名都来自于JSON的print_r输出。

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
                                (
                                )

                        )

                )

        )

)

我可以访问单行(不确定这是否是最佳实践)：

$OBJ->method()->top[0]->game->name;

但我不知道怎么循环所有的游戏名称。

任何帮助都非常感谢！

Answer 1

创建一个空数组，循环对象顶部数组并填充空数组：

$allgames=array();
foreach($OBJ->method()->top as $ob){

    $allgames[] = $ob->game->name;
}

Answer 2

“名称”是使用$OBJ->top[0]->game->name等访问的.因此，只需将foreach放在"top“数组上：

foreach($OBJ->top as $object) {
    echo $object->game->name;
}

Answer 3

将JSON字符串加载到PHP中时，可以使用：

json_decode($string_of_json, true);

true标志将加载到一个数组中，例如，可以使用foreach循环。