Can't read Cookies in php

Question

I created cookies inside the root of my server.

setcookie("hs_aff", $_GET["aff_id"], time()+(3600 * 24 * 7), '/');
setcookie("hs_aff_ref", $_SERVER['HTTP_REFERER'], time()+(3600 * 24 * 7), '/');

It exists, and can be read in the root.
But then I moved to:

http://hafoslevy.cz/objednat-slevu/5219/celkove-kosmeticke-osetreni-pleti-ktere-obsahuje-odliceni-cisteni-ultrazvukove-spachtle-peeling-laser-masaz-maska-arganove-serum-kolagen-a-liftingovy-krem-to-vse-za-neskutecnych-332-kc

And when I called var_dump() here, I didn't get these two.
What's wrong with it?
Thanks.

Answer 1

You need to specifiy the domain. If it should work for ALL subdomains you should be good with':

setcookie("hs_aff", $_GET["aff_id"], time()+(3600 * 24 * 7), '/', '.yourdomain.tld');
setcookie("hs_aff_ref", $_SERVER['HTTP_REFERER'], time()+(3600 * 24 * 7), '/', '.yourdomain.tld');