Create Simple Google Calendar Event in PHP

Question

I'm having a heck of a time trying to get a very simple event added to a calendar using the Google Calendar API, and I would love it if someone could point out my (probably obvious) issue. I'm using code that I found here. I've put the code in the "google-api-php-client/examples.calendar" directory, where a simple example can be found.

<?php
require_once '../../src/Google_Client.php';
require_once '../../src/contrib/Google_CalendarService.php';
session_start();


    $client = new Google_Client();
        $client->setApplicationName("Google Calendar PHP Starter Application");
        $client->setClientId('');
        $client->setClientSecret('');
        $client->setRedirectUri('worked.html'); //I made a file called "worked.html" in the same directory that just says "it worked!"
        $client->setDeveloperKey('SecretLongDeveloperKey');
        $cal = new Google_CalendarService($client);

if (isset($_GET['logout'])) {
    unset($_SESSION['token']);
}

if (isset($_GET['code'])) {
    $client->authenticate($_GET['code']);
    $_SESSION['token'] = $client->getAccessToken();
    header('Location: http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']);
}

if (isset($_SESSION['token'])) {
    $client->setAccessToken($_SESSION['token']);
}

$authUrl = $client->createAuthUrl();

 if (!$client->getAccessToken()){

    $event = new Google_Event();

        $event->setSummary('Halloween');
        $event->setLocation('The Neighbourhood');
        $start = new Google_EventDateTime();
        $start->setDateTime('2012-10-31T10:00:00.000-05:00');
        $event->setStart($start);
        $end = new Google_EventDateTime();
        $end->setDateTime('2012-10-31T10:25:00.000-05:00');
        $event->setEnd($end);
        $createdEvent = $cal->events->insert('secretLongCalendarId@group.calendar.google.com', $event);

}


echo $createdEvent->getId();

?>

When I access this script, I get a 404 error. I've tried going through the code and commenting out lines in an attempt to find the culprit - it appears to be the second-to-last line, which actually inserts the event.

Any advice? I'd really appreciate some pointers, as I cannot seem to get even the simplest of examples to work.

Answer 1

Your code almost works.

However, you redirect to "worked.html". That way your event does not get created after the redirect of authentication. Also the setRedirectUri should match what you entered in Google API plus console (see "Redirect URIs") AND it should be THIS file because this file is entering the event after the redirect. (You don't need the "worked.html")

So your simple.php should look like this (ALSO change the "Redirect URIs" on Google Api to http://localhost/simple.php, you need to specify the domain but can use localhost, in setRedirectUri you can specify the same)

<?php
error_reporting(E_ALL);
require_once 'google-api-php-client/src/Google_Client.php';
require_once 'google-api-php-client/src/contrib/Google_CalendarService.php';
session_start();

if ((isset($_SESSION)) && (!empty($_SESSION))) {
   echo "There are cookies<br>";
   echo "<pre>";
   print_r($_SESSION);
   echo "</pre>";
}

$client = new Google_Client();
$client->setApplicationName("Google Calendar PHP Starter Application");
$client->setClientId('###');
$client->setClientSecret('###');
$client->setRedirectUri('http://###/index.php');
$client->setDeveloperKey('###');
$cal = new Google_CalendarService($client);

if (isset($_GET['logout'])) {
  echo "<br><br><font size=+2>Logging out</font>";
  unset($_SESSION['token']);
}

if (isset($_GET['code'])) {
  echo "<br>I got a code from Google = ".$_GET['code']; // You won't see this if redirected later
  $client->authenticate($_GET['code']);
  $_SESSION['token'] = $client->getAccessToken();
  header('Location: http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']);
  echo "<br>I got the token = ".$_SESSION['token']; // <-- not needed to get here unless location uncommented
}

if (isset($_SESSION['token'])) {
  echo "<br>Getting access";
  $client->setAccessToken($_SESSION['token']);
}

if ($client->getAccessToken()){

  echo "<hr><font size=+1>I have access to your calendar</font>";
  $event = new Google_Event();
  $event->setSummary('Halloween');
  $event->setLocation('The Neighbourhood');
  $start = new Google_EventDateTime();
  $start->setDateTime('2013-9-29T10:00:00.000-05:00');
  $event->setStart($start);
  $end = new Google_EventDateTime();
  $end->setDateTime('2013-9-29T10:25:00.000-05:00');
  $event->setEnd($end);
  $createdEvent = $cal->events->insert('###', $event);
  echo "<br><font size=+1>Event created</font>";

  echo "<hr><br><font size=+1>Already connected</font> (No need to login)";

} else {

  $authUrl = $client->createAuthUrl();
  print "<hr><br><font size=+2><a href='$authUrl'>Connect Me!</a></font>";

}

$url = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
echo "<br><br><font size=+2><a href=$url?logout>Logout</a></font>";

?>

Also, like @BigMacAttack already stated, you only need the
$authURL = $client->createAuthURL(); once, only if getAccessToken failed.

Happy Halloween ;-)

Edit: I cleaned up the code a lot with working links to login and logout and log-messages.

Answer 2

The last portion of your code isn't using correct logic. The crux of the problem is with if (!$client->getAccessToken()). This statement, in the context of your sample code, roughly translates to: If you fail to get the access token, create the event. Obviously this is not what you want to happen. ;)

Instead try this:

if ($client->getAccessToken()){
    //succeeded in getting an access token, so create and insert the event
} else {
    $authUrl = $client->createAuthUrl();
    //failed to get an access token, so display $authurl as a link to open the auth window
}