PHP Sessions with disabled cookies, does it work?

If session.use_cookies = 1 (Cookie enabled.)

If session.use_cookies = 0 (Cookie disabled.)

If session.use_cookies = 1 then session stores the sessionId into cookie. Calling session_id() get the stored sessionId from cookie and saved data into session array will be found on all the pages. If session.use_cookies = 0 In this case session does not store sessionId into cookie and you will get each time a new sessionId using session_id() and data stored into session on other pages will not be found on another pages.

"A visitor accessing your web site is assigned a unique id, the so-called session id. This is either stored in a cookie on the user side or is propagated in the URL. "

Sessions: Introduction