Google Sheet Access Token - php

Question

I am a bit confused on the Access token. I have written a PHP script which inserts the data I get from the POST request , I already have authorized the App and it does add the Row at the end of the Sheet.
My Question is how I refresh the token when it get implemented on the server, as it will add the POST data.
Here is the Code
<?php
// Load the Google API PHP Client Library.
require_once __DIR__ . '/vendor/autoload.php';
session_start();
$client = new Google_Client();
$client->setAuthConfigFile(__DIR__ . '/client_secrets.json');
$client->addScope(Google_Service_Sheets::SPREADSHEETS);
if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
$client->setAccessToken($_SESSION['access_token']);
$lead = array (
"first_name" => $_POST['name'],
"email" => $_POST['email']
);
$sid = "sheet id on which the row is added";
addRowToSpreadsheet($lead, $client , $sid);
} else {
$redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . '/fb/oauth2callback.php';
header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
}
function addRowToSpreadsheet($ary_values = array(), $client , $sid) {
$sheet_service = new Google_Service_Sheets($client);
$fileId = $sid;
$values = array();
foreach( $ary_values AS $d ) {
$cellData = new Google_Service_Sheets_CellData();
$value = new Google_Service_Sheets_ExtendedValue();
$value->setStringValue($d);
$cellData->setUserEnteredValue($value);
$values[] = $cellData;
}
// Build the RowData
$rowData = new Google_Service_Sheets_RowData();
$rowData->setValues($values);
// Prepare the request
$append_request = new Google_Service_Sheets_AppendCellsRequest();
$append_request->setSheetId(0);
$append_request->setRows($rowData);
$append_request->setFields('userEnteredValue');
// Set the request
$request = new Google_Service_Sheets_Request();
$request->setAppendCells($append_request);
// Add the request to the requests array
$requests = array();
$requests[] = $request;
// Prepare the update
$batchUpdateRequest = new Google_Service_Sheets_BatchUpdateSpreadsheetRequest(array(
'requests' => $requests
));
try {
// Execute the request
$response = $sheet_service->spreadsheets->batchUpdate($fileId, $batchUpdateRequest);
if( $response->valid() ) {
// Success, the row has been added
return true;
}
} catch (Exception $e) {
// Something went wrong
error_log($e->getMessage());
}
return false;
}
?>
I have tried hosting the app on the server and it doesn't add a new row in the Sheet, I think this is a problem due to the Access Token
Please Help

Answer 1

There is actually a PHP Quickstart for Sheets API which includes how to refresh tokens. Here's a snippet:
// Refresh the token if it's expired.
if ($client->isAccessTokenExpired()) {
$client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
file_put_contents($credentialsPath, json_encode($client->getAccessToken()));
}
There's also a Refreshing an access token (offline access) guide with regard to refresh tokens
Access tokens periodically expire. You can refresh an access token
without prompting the user for permission (including when the user is
not present) if you requested offline access to the scopes associated
with the token.
If you use a Google API Client Library, the client object refreshes
the access token as needed as long as you configure that object for
offline access. If you are not using a client library, you need to set
the access_type HTTP query parameter to offline when redirecting the
user to Google's OAuth 2.0 server. In that case, Google's
authorization server returns a refresh token when you exchange an
authorization code for an access token. Then, if the access token
expires (or at any other time), you can use a refresh token to obtain
a new access token.
If your application needs offline access to a Google API, set the API
client's access type to offline:
$client->setAccessType("offline");