Re: A stupid question?

Eric Butera schreef:

On Jan 17, 2008 9:54 PM, Shelley Shyan <Shelley.Shyan@morodo.com.cn> wrote:

Hi all, Maybe this is a somehow stupid question. I want to know how php could know whether session_start() has been called, that is, whether session has been started. I Googled, but got little help. Thank you for help! Any tip is greatly appreciated. Regards, Shelley

One other thing is you won't be able to start a session if headers have been sent. It is a good idea to use output buffering to help aid with this.

no it's not a good idea to use output bufferin to 'help aid' this. instead write code that is logically structured so that the initialization of your pages/app/scripts occurs BEFORE any output is generated. to avoid spurious output of whitespace avoid including the trailing '?>' is included php[-only] files. (and ignore whatever Tedd says on the subject ;-)

If headers have been sent you'll get a nasty warning.

if (headers_sent()) { echo "oops!"; } use code to avoid warnings.

It can be a php.ini setting or you can simply call ob_start() on the first line of your script.