Google Drive Api PHP multipart upload empty content - php

Question

my issue is the following.
When using the google drive api V3 and php to upload a file to google drive, the file uploaded is empty, with a filesize of 0 bytes. All the metadata uploads no problem.
session_start();
$file_tmp=$_SESSION['file_tmp'];
$drive = new Google_Service_Drive($client);
$data = file_get_contents($file_tmp);
$file = new Google_Service_Drive_DriveFile(array(
'data' => $data,
'mimeType' => $file_type,
'name' => $file_name,
'description'=>$lolol,
'uploadType' => 'multipart',
'parents' => array($folderID),
'uploadType' => 'multipart'
));
$createdFile = $drive->files->create($file);
For anyone wondering, if I echo $file_tmp I get a path such as /private/var/tmp/phpDpmi83 .(I got this from a html form with input type file)
Originally i didn't have an UploadType and other forums said that was the issue, but I added that and still nothing.
Any suggestions?

Answer 1

I believe your goal as follows.
You want to upload a file with multipart/form-data to the specific folder in Google Drive using Drive API.
You want to achieve this using googleapis for PHP.
In your script, $drive can be used for uploading the file.
For this, how about this answer?
Modification point:
In your script, please separate the metadata and file content. By this, I think that your script works.
When above point is reflected to your script, it becomes as follows.
Modified script:
session_start();
$file_tmp=$_SESSION['file_tmp'];
$drive = new Google_Service_Drive($client);
$data = file_get_contents($file_tmp);
// I modified below script.
$file = new Google_Service_Drive_DriveFile(array(
'mimeType' => $file_type,
'name' => $file_name,
'description'=>$lolol,
'parents' => array($folderID),
));
$file_content = array(
'data' => $data,
'uploadType' => 'multipart'
);
$createdFile = $drive->files->create($file, $file_content);
Note:
In this modification, it supposes that $data is the file content. If your $file_tmp cannot be used, please test using a sample file.
In this case, the maximum file size is 5 MB. Please be careful this.
References:
Upload file data
googleapis for PHP