Google Api Client PHP Image Upload

upload_image_example.php

<?php

//Based on composer require google/api-client:^1.1

$filename = $_FILES['file']['name'];
$type = $_FILES['file']['type'];
$tmp_name = $_FILES['file']['tmp_name'];

$newurl = '/media/' . $filename;

//get service account credentials here: https://console.developers.google.com/project/APP-NAME/apiui/credential
$credentials = new \Google_Auth_AssertionCredentials(
    $service_email,
    ['https://www.googleapis.com/auth/devstorage.full_control'],
    file_get_contents('/path/to/keyfile.p12')
);

$client = new \Google_Client();
$client->setAssertionCredentials($credentials);
if ($client->getAuth()->isAccessTokenExpired()) {
    $client->getAuth()->refreshTokenWithAssertion();
}

//these might not be needed:
$client->setApplicationName($appname);
$client->setDeveloperKey($apidevkey);

//set acl
$acl = new \Google_Service_Storage_ObjectAccessControl();
$acl->setEntity('allUsers');
$acl->setRole('READER');

$storage = new \Google_Service_Storage($client);
$file = new \Google_Service_Storage_StorageObject();
$file->setName($newurl);
$file->setAcl($acl);
$file->setContentType($type);
$storage_file = $storage->objects->insert(
  BUCKET_NAME,
  $file,
  ['name' => $newurl, 'data' => file_get_contents($tmp_name), 'uploadType' => 'media', 'mimeType' => $type]
);

$accessResult = $storage->objectAccessControls->insert(BUCKET_NAME, $storage_file->getName(), $acl);

$image_href_url = $storage_file->getMediaLink();