Starting a session

[jakeone]

Hello,

session_start() will begin a session but, as I understand it, a session will also be started when you try to register a session variable.

Why, therefore, do you need to call session_start() in the following example? Won't registering the session variable on the second line start the session anyway?

session_start(); //necessary in this case?
$_SESSION['var']=true;

Just something I wanted to clear up.

Thanks.

[LordShryku]

session_start() needs to be called before any output. It starts the session. Registering session variables can be done anywhere on the page, as long as the session is already started.