PHP Cookie session dig a bit

When a user accesses the Web (www.96net.com.cn) in a browser, the server opens the Session_Start () server TMP temp directory automatically generated session_id and put back to create a cookie to save SessionID (saved in the browser, no file stored), you can set the cookie expiration time, close the browser cookie SessionID invalid session stored in the TMP directory, you can set the expiration time, there is a random recovery mechanism to delete SessionID when the cookie is disabled, Session can be passed via URL SessionID

PHP Cookie session dig a bit