I used WordPress 3.6.1 in debug mode, WP-Statistics 3.2 all running on PHP 5.4.19.
When I browse, I strip my HTTP headers of the
HTTP_REFERERheader, and if WordPress is in debug mode, I get the following notice:
Notice: Undefined index: HTTP_REFERER in wp-content/plugins/wp-statistics/includes/class/statistics.class.php on line 125
I took a quick look at the code line in question and it seems that it assumes that
$_SERVER['HTTP_REFERER']will be set.
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