Cookies and Subdomains

How do I get one cookie for all subDomains?

[yotam]

Hi,

I want to enable registering my web and I have many subdomains, how can I get the cookie from [myDomain.com...] for all my subdomains such as:
from :

[subDomain1.myDomain.com...]
[subDomain2.myDomain.com...]
[subDomain3.myDomain.com...]

and be able to recognize the user?

Any help?

[eelixduppy]

Take a look at this thread [webmasterworld.com].