session_start();

benracer

Hi,
Would it be a good idea to have session_start(); at the top of every page even if no session is used? I would like to have one page that contains all the headers and meta etc... Thanks 🙂

dagon

if your not using sessions no need to start them.

your logic is the same as your sig, im not going to use sessions so i shall start them

benracer

Hi,
Yes but i would only like to have one include for the headers that will suit every page on my site. Thanks

dagon

<?php include (headers.php) ?>

whats the session for?

benracer

Sorry, i think i may have been unclear. I am creating a site that has the same template so i am putting the doctype and headers into one include that will be included on the top of every static page. As session_start(); has to be placed at the top i was going to add it above the doctype so it would now be included on every page. I was wondering if this is a good idea to have session start on every single page as some will not use a session?

dagon

i would only run it when needed, but if 90% of your pages use it, including it in all wouldn't be any real problem, if only 10% need it, i''ld determine a way to only include it for those.

benracer

Thanks, could anyone suggest any disadvantages? 😉

dagon

running any function for no purpose takes resources time\cpu\mem

guywithLAMP

There is no harm in using the session_start() in the page. Anyway the session will be in the memory and it will be red by this statement.

Weedpacket

There will also be session data stored (a file, or a db record) which would have to be read into memory when the session is started. A session ID would also be sent out to the client so that they can maintain their end of the session.

If sessions are being used in one part of the site, and the user is still of the school to disallow cookies, the session ID is embedded in the URL. On any page that doesn't use sessions, that ID will not appear, and the session will be lost. They won't like it if visiting certain parts of the site causes it to forget about them.