$HTTP_REFERER in PHP

[Cheap Bastard]

what could cause HTTP_REFERER to be empty?
Also, what happens if it's about:blank, a bookmark, homepage, ...

[lucifer]

browsers don't have to send the header

they send stuff for bookmarks etc not sure what but I get such things in my log file analysis

experiment :)

[Cheap Bastard]

thanks lucifer
i'm a little too busy right now to go wade through my raw log file though... (not saying you're not, but if you knew i wouldn't have to waste time doing it too)

[lucifer]

make a page that prints $HTTP_REFERER and go to it from different places see what you get