PHP Google Drive API installation and file upload - php

Question

Hi guys i'm trying uploading file trought G drive API.
Can't find out why it returns error:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Gdrive{
function initialize(){
$credentials = $this->GetOAuth2Credentials($_GET['code']);
$_SESSION['credentials'] = $credentials;
}
/**
* Exchange an authorization code for OAuth 2.0 credentials.
*
* #param String $authorizationCode Authorization code to exchange for an
* access token and refresh token. The refresh token is only returned by
* Google on the very first exchange- when a user explicitly approves
* the authorization request.
* #return OauthCredentials OAuth 2.0 credentials object
*/
function GetOAuth2Credentials($authorizationCode) {
$client = new apiClient();
$client->setClientId(Config::5112+++++.apps.****5971157#developer.gserviceaccount.com);
$client->setRedirectUri(Config::site_url());
/**
* Ordinarily we wouldn't set the $_GET variable. However, the API library's
* authenticate() function looks for authorization code in the query string,
* so we want to make sure it is set to the correct value passed into the
* function arguments.
*/
$_GET['code'] = $authorizationCode;
$jsonCredentials = json_decode($client->authenticate());
$oauthCredentials = new OauthCredentials(
$jsonCredentials->access_token,
isset($jsonCredentials->refresh_token)?($jsonCredentials->refresh_token):null,
$jsonCredentials->created,
$jsonCredentials->expires_in,
Config::CLIENT_ID,
Config::CLIENT_SECRET
);
return $oauthCredentials;
}
function SaveNewFile($inputFile) {
try {
$mimeType = 'text/plain';
$file = new Google_DriveFile();
$file->setTitle($inputFile->title);
$file->setDescription($inputFile->description);
$file->setMimeType($mimeType);
// Set the parent folder.
if ($inputFile->parentId != null) {
$parentsCollectionData = new DriveFileParentsCollection();
$parentsCollectionData->setId($inputFile->parentId);
$file->setParentsCollection(array($parentsCollectionData));
}
$createdFile = $this->service->files->insert($file, array(
'data' => $inputFile->content,
'mimeType' => $mimeType,
));
return $createdFile;
} catch (apiServiceException $e) {
/*
* Log error and re-throw
*/
error_log('Error saving new file to Drive: ' . $e->getMessage(), 0);
throw $e;
}
}
}
when i invoke the initialize() method it returns error:
Message: Undefined index: code
Fatal error: Class 'apiClient' not found
what should be? i'm doing right in my code ? does i need more code to make it works? i created web application project on google api console.
need i to include google php sdk? in the google docs it is not mentioned for google drive api :/

Answer 1

You are probably using an older version of the PHP client library. Make sure you have the latest source and follow the instructions in the Google Drive SDK quickstart page to learn how to write a complete PHP app to upload a file to Drive:
https://developers.google.com/drive/quickstart

Answer 2

require_once 'google-api-php-client/src/Google_Client.php';
require_once 'google-api-php-client/src/contrib/Google_DriveService.php';
$client = new Google_Client();
please use those require files and Google_Client().