[SOLVED] SESSION being set even before its called

[Nolongerused3921]

For some reason when I set a $_SESSION after a mysql statement, the $_SESSION ends up being assigned before anything before it has a chance to run...
I have no idea what is going on here, all I have is an inkling... I'm afraid that ob_start() is responsible for this, and its become a major thorn in my side, and my temporary solution is causing more trouble then it is worth....

So,
a) What could be causing this, if not ob_start()
b) Regardless of the answer to (a), how can I fix this?


Example of it (This is obviously not the actual code, just pseudo code as the actual code is nearly 1000 lines long):
($_SESSION['blah'] = "blah" before being reassigned)
[code=php:0]
if ($action == this) {
$mysql->query(add the session into the database);
//Done with the session
$_SESSION['blah'] = 0;
redirect to new page();
}
[/code]

This would result in 0 being put into the query instead of "blah".

[trq]

ob_start effects output, not script logic. Its does seem odd though.

[Nolongerused3921]

Well $_SESSION is considered a header, is it not? I'm afraid that its automatically being placed before the logic in the buffer then the php is being executed afterwards... Although I'm not sure
I just know that after placing [b]many[/b] print's, the $_SESSION is screwed up when inside the main logic ($action == "blah"), as long as another $_SESSION reassignment is in there as well... Which makes me think SESSION really is a header, and php doesn't execute code until after moving headers.

[trq]

Yeah that makes sense. Sessions need cookies, and cookies are created via header calls.

Id'e say youv'e found the problem, fixing it is probably all together another issue.

[Nolongerused3921]

Well... To be honest I've been aware of the problem for awhile, I just need to know how to fix it, which like you said is another issue :(
If anyone has ran into this problem before I would be incredibly thankful if you'd tell me how you fixed it

[taith]

$_SESSION[] is technically not a header. however since it is stored within the browser itself... php does grab them from the browser as tho it were a header. it does this before anything is returned to the browser, which is why session_start(); after text has been output dies immediatly.

simple fix is putting session_start(); before the ob_start(); that should fix it.

[Nolongerused3921]

That fixed it! Thanks, the bug has annoyed me to no extent for the past 2 weeks, I just never put any real thought into it until now.

Edit: Wheres "topic solved"...?

[taith]

welcome

bottom left corner :-)

[trq]

Sorry, the board has been upgraded and the topic solved mod is no longer with us. Will be fixed soon.

Ive edited your title.

[Nolongerused3921]

Okay thanks, I was worried there since it wasn't showing up for me.