Steam Web API连接到数据库

如何解决Steam Web API连接到数据库

我正在尝试将Steam Web API连接到我的数据库，并希望存储通过Steam登录的每个用户的姓名，个人资料图片等。

当我看一些有关它的视频时，我尝试做同样的事情，但是遇到了一些错误。

我使用的文件：https://github.com/SmItH197/SteamAuthentication

Notice: Trying to get property 'response' of non-object in C:\xampp\htdocs\index.PHP on line 32

Notice: Trying to get property 'players' of non-object in C:\xampp\htdocs\index.PHP on line 32

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\index.PHP on line 32

foreach ($content->response->players as $player)
{
    $sql_fetch_id = "SELECT * FROM users_steam WHERE steamid = $player->steamid";
    $query_id = MysqLi_query($db,$sql_fetch_id);
    
    if(MysqLi_num_rows($query_id) == 0) {
        $sql_steam = "INSERT INTO users_steam (name,steamid,avatar) VALUES ('$player->personaname','$player->steamid','$player->avatar')";
        MysqLi_query($db,$sql_steam);
    }
}