How to Get Channel id or url after Google Oauth PHP - php

Question

i am trying to code an application system with youtube login. but i have an issue After i get required authorisation with oauth 2.0 i want to get choosen youtube channel id in a string but i could not do it can somebody please help me.
$client = new Google_Client();
$client->setClientId($client_id);
$client->setClientSecret($client_secret);
$client->setRedirectUri($redirect_uri);
$client->setApplicationName("BYTNETWORK");
$client->setScopes(array('https://www.googleapis.com/auth/userinfo.profile',
'https://www.googleapis.com/auth/yt-analytics.readonly'
));
if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
$client->setAccessToken($_SESSION['access_token']);
} else {
$authUrl = $client->createAuthUrl();
}
so after this i want a string like
$channelid = "xxxxx"; to use it in code below
$data = file_get_contents('http://gdata.youtube.com/feeds/api/users/$channelid?alt=json');
$data = json_decode($data, true);
$stats_data = $data['entry']['yt$statistics'];
$medya = $data['entry']['media$thumbnail'];
//yt$username kısmından kanal adı parse edilir
/**********************************************************/
echo "<img src='$medya[url]'></img><br>";
echo "Subscribers: $stats_data[subscriberCount]<br>";
echo "Views: $stats_data[totalUploadViews]<br>";

Answer 1

Using OAUTH 2, you can get a refresh_token and an access_token for the requested scope(s).
If you want to get the YouTube channel-id, for an authorized user, using his access_token, then you send the request:
https://www.googleapis.com/youtube/v3/channels?part=id&mine=true&access_token=HereYourAccessToken
In the request above you need to replace the string "HereYourAccessToken".
The respone is a JSON string. And the channel-id is in the field named: items['id'] (or items.id).
Note, that an access_token expires after 1 hour. If so, then use the refresh_token to obtain a new one,
The refresh_token is valid until revoked by the owner.