Check if a cookie exists on another domain

Question

I have actually set the following cookie for the following domain:

setcookie("thing", $data, time()+3600, "/", "example1.com", 1);

The cookie was set from this domain: example2.com

When I try to search for the cookie 'thing' I can't seem to find it. How is it possible to set a cookie on a domain, which will remain on another domain if I search for it?

UPDATE:

I basically want to pass a value from Domain A to Domain B. When a visitor arrives to Domain A he/she gets redirected AND pass a value to Domain B which I'd like to capture there.

How is it possible?

I should hope this is not possible. Browsers should know better than to allow Domain A to access the cookies for Domain B. — David, Apr 03 '13 at 18:39
imagine the fun people could have if `nastysite.ru` could set/get cookies for `bankofamerica.com`. — Marc B, Apr 03 '13 at 18:41
IS there anything what I can pass which identifies that I came from another domain, when I got redirected? — user1406071, Apr 03 '13 at 18:41
sure, you can embed whatever you want in the redirect url. but you can NOT use cookies — Marc B, Apr 03 '13 at 18:42
@user1406071: It's not clear what you're trying to do. Define "came from another domain." If you're performing a redirect then I imagine you could add anything you want to the query string, for example. — David, Apr 03 '13 at 18:42
I wonder how this works... http://www.networkadvertising.org/choices/ I suppose it's just a company that others use. Not sure. But just found it interesting and maybe relevant. — Shaz, Apr 03 '13 at 18:45
Use subdomains instead: http://stackoverflow.com/questions/18492576/share-cookie-between-subdomain-and-domain — Dmitrii Malyshev, Apr 05 '16 at 14:41

score 3 · Answer 1 · edited Jun 08 '18 at 15:41

3

Every browser prevents it.

Cookies can not be shared between domains. https://wikipedia.org/wiki/Same-Origin-Policy

edited Jun 08 '18 at 15:41

Zoe

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answered Apr 03 '13 at 18:39

scones

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score 0 · Answer 2 · answered Apr 03 '13 at 18:41

0

I'm pretty sure it is impossible to create a cookie for another domain - this would be a pretty significant security hole.

See @scones' link.

answered Apr 03 '13 at 18:41

Hal

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Check if a cookie exists on another domain

2 Answers2