I have a page that only allows visitors coming from inside the same site to see it. If they are referred from somewhere else, they are redirect to my main site's page. I've placed this PHP command to perform it: if (strpos($_SERVER[HTTP_REFERER],"site.com")==0) { header("Location: http://www.site.com"); exit(); } Do you think this will affect Google Analytics reports?
I'm not sure. On topic tho the referer check is not reliable, I would use another technique to protect my content if I were you.
Not sure what effect it will have on the browser though probably it is better to add the respective settings and by making a backup of your current data. Then after a week you can compare the difference.