Undefined index: HTTP_REFERER

Undefined index: HTTP_REFERER

Versions 2.4.7 to 4.1.6
In /blog/skins/****/
In [posts.main.php] after <-- Messages Generated From Actions -->

Add code to check if $_SERVER['HTTP_REFERER'] is set; to avoid error;

Replace

Code

$url = $_SERVER['HTTP_REFERER'];

with

Code

//$url = $_SERVER['HTTP_REFERER'];
$url = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '';

Removed in {blood_wine, elf, space} skins only