How to remove the Set-Cookie from the response header information?

  ios, question

The HTTP status query on the page is as follows. The purpose is to speed up the CDN. The CDN side can say the Set-Cookie in the U-turn message.

Return Status Code: 200
HEAD information returned by the webpage is as follows
Date: Mon, 03 Mar 2014 09:02:08 GMT
Server: Apache/2.2.22 (Win64) PHP/5.4.3
X-Powered-By: ThinkPHP
Set-Cookie: PHPSESSID=assum1ediernlvg12ao3cf2ha2; path=/
Expires: Mon, 03 Mar 2014 12:02:08 GMT
Cache-Control: max-age=3600
Last-Modified: Sat, 01 Mar 2014 13:34:36 GMT
Vary: Accept-Encoding,User-Agent
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html; charset=utf-8

Tp default convention configuration, there is such a line:

/* SESSION settings */
 SESSION_AUTO_START' => true, // whether to open session automatically

The session is automatically started by default.
Php’s session sends sess id as a cookie to the user agent by default.