Question

我如何从“玩家”中获得“游戏”并且值为“730”的所有“加速器”？它显示：
注意未定义的属性：第31行的stdClass :: $ gameid 因为“gameid”并不存在于每个元素中

代码：

$players = json_decode(file_get_contents("test.json"));
foreach($players->response->Players as $mydata)
{
if($players->gameid == "730"){
echo $mydata->steamid . "\n";
}

}

我的json：

{
    "response": {
        "players": [
            {
                "steamid": "76561198273176399",
                "loccountrycode": "US"
            },
            {
                "steamid": "76561198386141115",
                "gameid": "730",
                "loccountrycode": "DE"
            },
            {
                "steamid": "76561198019025166",
                "gameid": "730",
                "loccountrycode": "RU"
            },
            {
                "steamid": "76561198010529217",
                "loccountrycode": "DK"
            }
        ]

    }
}

非常感谢。最诚挚的问候。

Answer 1

更改

$players->response->Players
if($players->gameid == "730"){

要

$players->response->players // small letter "p"
if($mydata->gameid == "730"){

与$mydata->steamid

相同

因为不是每个玩家都有gameid，所以最好还是检查一下：

if( isset($mydata->gameid) && $mydata->gameid === '730' ) // or check on empty if the "gameid" can be set but also can be empty

PHP Json解码对象存在

1 个答案: