how to get cookies from a different domain with php and javascript

Question

Suppose i have a cookie set in first.com say user. Now i want to read that cookie in second.com through javascript and ajax. But it is not working.I have got xmlHttp.status=

Answer 1

You can't read cookies from another domain - end of.

The only way I can think of is to add some code to the 2nd domain that gets the cookies for you and then to place this in a page on the 1st domain, in an iframe.

You obviously need full access to both domains to be able to do this kind of thing.

Answer 2

Your problem is that browsers wont let javascript to access different domain. Add:

header('Content-type: text/html');    
header('Access-Control-Allow-Origin: *');   

lines to the beginning of cookie.php and it'll work. Still, you wont get the cookie (or at least in Chrome). I couldnt yet figure out why. It seems as if chrome creates a new session for the javascript and wont let that session access previous cookies. Like HttpOnly.