I’ve recently started looking at the Google Calendar Data API for PHP for use in an upcoming project. It uses Zend Framework which has a pretty nice library complete with documentation here allowing for just about every operation I required…except deleting calendars (which is a bit strange, considering you’re able to create them with the API). This seems to be a limitation with version 1.0 of the API. Version 2 allows for deletion of calendars however there’s no documentation PHP implementation yet. After a long night of researching and hair pulling I’ve finally managed to come up with a working script provided.
EDIT – Now working with Zend Framework!