<?php

/**

* This sample sets a custom banner for a user's channel by:

*

* 1. Uploading a banner image with "youtube.channelBanners.insert" method via resumable upload

* 2. Getting user's channel object with "youtube.channels.list" method and "mine" parameter

* 3. Updating channel's banner external URL with "youtube.channels.update" method

*

* @author Ibrahim Ulukaya

*/

// Call set_include_path() as needed to point to your client library.

require_once 'Google/Client.php';

require_once 'Google/Service/YouTube.php';

session_start();

/*

* You can acquire an OAuth 2.0 client ID and client secret from the

* {{ Google Cloud Console }} <{{ https://cloud.google.com/console }}>

* For more information about using OAuth 2.0 to access Google APIs, please see:

* <https://developers.google.com/youtube/v3/guides/authentication>

* Please ensure that you have enabled the YouTube Data API for your project.

*/

$OAUTH2_CLIENT_ID = 'REPLACE_ME';

$OAUTH2_CLIENT_SECRET = 'REPLACE_ME';

$client = new Google_Client();

$client->setClientId($OAUTH2_CLIENT_ID);

$client->setClientSecret($OAUTH2_CLIENT_SECRET);

$client->setScopes('https://www.googleapis.com/auth/youtube');

$redirect = filter_var('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'],

FILTER_SANITIZE_URL);

$client->setRedirectUri($redirect);

// Define an object that will be used to make all API requests.

$youtube = new Google_Service_YouTube($client);

if (isset($_GET['code'])) {

if (strval($_SESSION['state']) !== strval($_GET['state'])) {

die('The session state did not match.');

}

$client->authenticate($_GET['code']);

$_SESSION['token'] = $client->getAccessToken();

header('Location: ' . $redirect);

}

if (isset($_SESSION['token'])) {

$client->setAccessToken($_SESSION['token']);

}

// Check to ensure that the access token was successfully acquired.

if ($client->getAccessToken()) {

try{

// REPLACE with the path to your file that you want to upload for thumbnail

$imagePath = "/path/to/file.jpg";

// Specify the size of each chunk of data, in bytes. Set a higher value for

// reliable connection as fewer chunks lead to faster uploads. Set a lower

// value for better recovery on less reliable connections.

$chunkSizeBytes = 1 * 1024 * 1024;

// Setting the defer flag to true tells the client to return a request which can be called

// with ->execute(); instead of making the API call immediately.

$client->setDefer(true);

$chan = new Google_Service_YouTube_ChannelBannerResource();

// Create a request for the API's channelBanners.insert method to upload the banner.

$insertRequest = $youtube->channelBanners->insert($chan);

// Create a MediaFileUpload object for resumable uploads.

$media = new Google_Http_MediaFileUpload(

$client,

$insertRequest,

'image/jpeg',

null,

true,

$chunkSizeBytes

);

$media->setFileSize(filesize($imagePath));

// Read the media file and upload it chunk by chunk.

$status = false;

$handle = fopen($videoPath, "rb");

while (!$status && !feof($handle)) {

$chunk = fread($handle, $chunkSizeBytes);

$status = $media->nextChunk($chunk);

}

fclose($handle);

// If you want to make other calls after the file upload, set setDefer back to false

$client->setDefer(false);

$thumbnailUrl = $status['url'];

// Call the API's channels.list method with mine parameter to fetch authorized user's channel.

$listResponse = $youtube->channels->listChannels('brandingSettings', array(

'mine' => 'true',

));

$responseChannel = $listResponse[0];

$responseChannel['brandingSettings']['image']['bannerExternalUrl']=$thumbnailUrl;

// Call the API's channels.update method to update branding settings of the channel.

$updateResponse = $youtube->channels->update('brandingSettings', $responseChannel);

$bannerMobileUrl = $updateResponse["brandingSettings"]["image"]["bannerMobileImageUrl"];

$htmlBody .= "<h3>Thumbnail Uploaded</h3><ul>";

$htmlBody .= sprintf('<li>%s</li>',

$thumbnailUrl);

$htmlBody .= sprintf('<img src="%s">', $bannerMobileUrl);

$htmlBody .= '</ul>';

} catch (Google_Service_Exception $e) {

$htmlBody .= sprintf('<p>A service error occurred: <code>%s</code></p>',

htmlspecialchars($e->getMessage()));

} catch (Google_Exception $e) {

$htmlBody .= sprintf('<p>An client error occurred: <code>%s</code></p>',

htmlspecialchars($e->getMessage()));

}

$_SESSION['token'] = $client->getAccessToken();

} else {

// If the user hasn't authorized the app, initiate the OAuth flow

$state = mt_rand();

$client->setState($state);

$_SESSION['state'] = $state;

$authUrl = $client->createAuthUrl();

$htmlBody = <<<END

<h3>Authorization Required</h3>

<p>You need to <a href="$authUrl">authorize access</a> before proceeding.<p>

END;

}

?>

<!doctype html>

<html>

<head>

<title>Banner Uploaded and Set</title>

</head>

<body>

<?=$htmlBody?>

</body>

</html>