使用php cURL在子域上设置cookie

Question

I am trying to use curl to set a cookie on a subdomain. Everything is working except for the cookie being set.

Am I wrong to think the following sets a cookie across all subdomains?

setcookie('cookiename','value', time()+3600,"/",".domain.com");

Answer 1

Am I wrong to think the following sets a cookie across all subdomains?

Yes, you are wrong. setcookie() is not related to curl in any way. So this won't work.

You might be looking for CURLOPT_COOKIE and similar curl options, see Sending cookie in cURL request .

Further on, you find the actual specification RFC 6265 more specifically 5.2.3. The Domain Attribute .