CSRF token for ajax

I have a problem with forms submitted with ajax. I do my forms with Zend Framework. Some are real forms so I add a Hash element. Others are for small operations (like upvote and downvote here) so I do them with links.

My problem is that I need to use ajax especially for the small forms (the links). I see a lot of questions but nothing comprehensive enough to solve the problem. Is there a detailed description on how to get csrf token working smoothly when forms are submitted via ajax? preferably with Zend Framework but general PHP answers will help too.

Solution

You don't need a CSRF token. You case use the HTTP_X_REQUESTED_WITH method (see e.g. here).

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