I've been trying for several days now to get a Google Calendar API up and running with absolutely no luck. I'm using PHP and a service account for authentication. I have followed this tutorial (http://www.daimto.com/google-calendar-api-with-php-service-account/) and the code below is from that tutorial.
I have setup my developers console to allow the calendar API, and I have added the developers email address to the calendar share section.
When I run this code, I just get a blank page - no error, no text of any kind, just a blank white page. I'm completely lost - any help would be much appreciated. Cheers
<?php
require 'vendor/autoload.php';
session_start();
$client_id = '123456789-qwertyuiop.apps.googleusercontent.com';
$Email_address = '[email protected]';
$key_file_location = 'path_to_key/key.p12';
$client = new Google_Client();
$client->setApplicationName("Client_Library_Examples");
$key = file_get_contents($key_file_location);
// separate additional scopes with a comma
$scopes ="https://www.googleapis.com/auth/calendar.readonly";
$cred = new Google_Auth_AssertionCredentials(
$Email_address,
array($scopes),
$key
);
$client->setAssertionCredentials($cred);
if($client->getAuth()->isAccessTokenExpired()) {
$client->getAuth()->refreshTokenWithAssertion($cred);
}
$service = new Google_Service_Calendar($client);
?>
<html><body>
<?php
$calendarList = $service->calendarList->listCalendarList();
while(true) {
foreach ($calendarList->getItems() as $calendarListEntry) {
echo $calendarListEntry->getSummary()."<br>\n";
// get events
$events = $service->events->listEvents($calendarListEntry->id);
foreach ($events->getItems() as $event) {
echo "-----".$event->getSummary()."<br>";
}
}
$pageToken = $calendarList->getNextPageToken();
if ($pageToken) {
$optParams = array('pageToken' => $pageToken);
$calendarList = $service->calendarList->listCalendarList($optParams);
} else {
break;
}
}
?>