Question

I’m going to use cookies and sessions to indentify the user. So, sessions will be used only when user chose the ‘Don’t remeber me’ option.
I include the identification file in the top of every page of website.
User’s session looks like $_SESSION['user']

And than is my question:

Must I place to the authentication file session_start() instruction? I asked it because new session creates every time I use this instruction.

Update
http://pastebin.com/Nh3zj6mR user identification script

Answer 1

Yes, you have to place session_start() at top of every php page (before any output was generated, no headers must have sent before) to tell php to accept / start session, expect your php.ini is setup, that sessions start automatic.

I asked it because new session creates every time I use this instruction.<<

That is a hint, that your browser ignore (disallow) session cookies