无foreach的PHP-JSON解码

如果没有foreach循环，如何从I-json获取“avatarmedium”？ 这是我目前的代码：

   $json = '{
    "response": {
        "players": [
            {
                "steamid": "76561198019025166",
                "avatarmedium": "https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/d3/d3ca76e0f1e8d071e826bc3baeebd0e7215e50e2_medium.jpg"

            }
        ]

    }
}';

$result = json_decode ($json);
echo $json->response[0]->players->profileurl;

多谢各位 致以最诚挚的问候

<?php
       $json = '{
    "response": {
        "players": [
            {
                "steamid": "76561198019025166",
                "avatarmedium": "https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/d3/d3ca76e0f1e8d071e826bc3baeebd0e7215e50e2_medium.jpg"

            }
        ]

    } }';

$result = json_decode ($json); 
echo $result->response->players[0]->avatarmedium;