I can't find an answer to this anywhere ... simple question really:

Traffic comes from site a: www.incoming.com

to my site: www.mysite.com

a script on www.mysite.com uses php header to redirect to destination site: www.destination.com

question is, how can I make the server logs etc. on www.destination.com show that the traffic came from www.mysite.com and NOT www.incoming.com ?

is there a php way to do that?
is HTTP_Referrer a solution?