json_decode - issues with api - php

Question

I am trying to find the game someone is playing on twitch by using the api. I have setup the json_decode and it shows all of the content from the api. However whenever I try to print_r the game I get an error.
The error:
Notice: Undefined property: stdClass::$game in C:\Program Files (x86)\EasyPHP-DevServer-14.1VC11\data\localweb\projects\Portfolio -- Website\twitchstreaminfo\streaminfo.php on line31
PHP code:
$streamer = $_POST['username'];
$apiurl = "https://api.twitch.tv/kraken/streams/" . $streamer;
$apicontent = file_get_contents($apiurl);
$streamerinfo = json_decode($apicontent);
print_r($streamerinfo->game);

Answer 1

Try just doing the following first and verify the result:
print_r( $streamerinfo );
From what I can see with the API, the following should work:
print_r( $streamerinfo->stream->game );

Answer 2

Your error is saying that the propery of "$game" does not exist on the object "$streamerinfo". As suggested above, try priting the "$streamerinfo" to varify that it is valid. Another thing you can do to prevent this is to add the following :
if (isset($streamerinfo->game) {
print_r($streamerinfo->game);
}
That code will prevent this error, but not fix the problem. I suggest this as a final solution to help you solve the problem
if (isset($streamerinfo->game) {
print_r($streamerinfo->game);
} else {
print_r($streamerinfo);
}
This will keep your code from breaking in the way that it is now. But, it will also print "$streamerinfo" if it fails. This way you can see why it failed.