undefined variable: _POST in drupal_build_form()

Hm, I don't immediately think this is an issue with AJAX Poll. It sounds like the global $_POST values aren't getting sent or they're getting discarded by PHP. I imagine that the poll doesn't actually save the value?

I got the same problem after upgrading to Drupal 7.9
Vote results not shown after voting- but after reloading the page my vote (or canceled vote) is perfectly saved.

( Example in Croatian language here: http://test.mojadelta.com/hr/pitanje-broj-1 )

I got this in the log report:
Notice: Undefined variable: _POST in drupal_build_form() (line 297 of /var/www/vhosts/mojadelta.com/httpdocs/includes/form.inc).

I'm having the same problem. Anyone found a solution yet ?

same issue - any solution?

Hello experts,

I am getting same error when I am trying to create a 'Flexible' template of panel layout. When in the "show designer layout" mode and trying to go to "column settings" or "row settings", it throw a window saying "you are not authorize to view this page" and also shows error message "Notice: Undefined variable: _POST in drupal_build_form() (line 309 of C:\wamp\www\mySite".

Any Idea, Plz help

From what it seems the culprit is

unset($_POST);

in the function ajax_poll_callback

Anyone able to solve this?

Try this patch.

Maybe setting _POST to array() is better.

The patch which sets $_POST = array().

This error still exists.

Drupal 7.43, Ajax poll 7.1.1

This error still exists and the patch still applies.

I've tested it and can confirm that it fixes the error. The patch is straightforward code-wise, so RTBC.

While this is a minor patch, I just wanted to mention I'm running Panels as well as quite a few other modules, and not seeing this error.

I don't think Ajax Poll is the source of the problem.

Update on our situation. We implemented the Authcache module (https://www.drupal.org/project/authcache) on our site, including support for Ajax-based forms, and started seeing this problem. Adding the patch fixed it.

We don't see this issue with Ajax Comments + Authcache, which I assume should be a similar process. We include both options below in Authcache's form token derived from base form id:

poll_view_voting
comment_node_*_form

We also have the Cache Object API module (https://www.drupal.org/project/cacheobject) implemented, which should take care of any issues with Ajax-enabled forms.

So there must be something with Ajax Poll that is a bit different.