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in Q2A Core by
getting undefined index error when clicking login button from home page.


Notice: Undefined index: user in /home/mathhome/public_html/qa-include/qa-app-limits.php on line 70


Any ideas?
Q2A version: 1.6.1

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Yes, I think this is a bug. This function is no longer used by the core but was included for backwards compatibility, so presumably some plugin is still access it. You can fix it as follows:

return qa_limits_calc_remaining($action, $dblimits['user'], $dblimits['ip']);

... to ...

return qa_limits_calc_remaining($action, @$dblimits['user'], @$dblimits['ip']);

worked perfectly, thanks.