How to make cookie in php track both in www.site.com and site.com for some web-site?

Set the domain argument to just ’.site.com’, including the leading period, rather than accepting the default (which will be whatever the current domain is)

http://php.net/manual/en/function.setcookie.php shows the function accepts domain as the 5th argument. You have to set it explicitly.

bool setcookie ( string $name [, string $value [, int $expire = 0 [, string $path [, string $domain [, bool $secure = false [, bool $httponly = false ]]]]]] )

So you might have something like:

setcookie(‘my_cookie’, 123, 0, ””, ’.site.com’);

Thanks, that helps. Although I tried it before and it didn’t seem to work, but maybe I did something wrong at that time.

Create a 301 redirect that redirects anyone from the www version to the non www version. Search engine friendly and makes sure everyone is in the same location.

http://no-www.org/ :)