Sorry, there was a second error in wp-content/plugins/google-hilite.php that I forgot to mention in the last post. In the function is_referer_search_engine the variable $_SERVER['HTTP_REFERER'] is being used even if it is undefined. The causes the following error:
Undefined index: HTTP_REFERER
A simple fix would be to simply add a check to see if HTTP_REFERER is defined so the new code would look like:
function is_referer_search_engine($engine = 'google') {
$siteurl = get_settings('home');
if( empty($_SERVER['HTTP_REFERER']) ) {
return 0;
}
$referer = urldecode($_SERVER['HTTP_REFERER']);
//echo "referer is: $referer
";
if ( ! $engine ) {
return 0;
}
switch ($engine) {
