Google Calendar API with PHP – Service Account -


i've been trying several days google calendar api , running absolutely no luck. i'm using php , service account authentication. have followed tutorial (http://www.daimto.com/google-calendar-api-with-php-service-account/) , code below tutorial.

i have setup developers console allow calendar api, , have added developers email address calendar share section.

when run code, blank page - no error, no text of kind, blank white page. i'm lost - appreciated. cheers

<?php  require 'vendor/autoload.php'; session_start();          $client_id = '123456789-qwertyuiop.apps.googleusercontent.com'; $email_address = '123456789-qwertyuiop@developer.gserviceaccount.com';    $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 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() $calendarlistentry) {          echo $calendarlistentry->getsummary()."<br>\n";          // events          $events = $service->events->listevents($calendarlistentry->id);          foreach ($events->getitems() $event) {             echo "-----".$event->getsummary()."<br>";         }     }     $pagetoken = $calendarlist->getnextpagetoken();     if ($pagetoken) {         $optparams = array('pagetoken' => $pagetoken);         $calendarlist = $service->calendarlist->listcalendarlist($optparams);     } else {         break;     } }  ?>

when run code, blank page - no error, no text of kind, blank white page. i'm lost - appreciated. cheers

on note, running similar frustration , discovered script automatically created error_log in separate file on server. open in code editor , can see detailed responses. not sure if @ all, helped me ton.


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