Headers already sent problem!

narked

I am trying to put a javascript BEFORE a session_start(); in php. the problem is that when I run the page an error says that the headers are already sent bu the line in which I have my javascript and that the session can not start.

the same problem occurs when I try to make a browser redirection: header('Location: page2.php'); after the <htm> or <body> tag.

this is very strange because in the web server I was before I didnt have the header problems when trying to redirect the browser after html tags, now Im on a new server and It just let me redirect the browser or start a session if I put the code at the beggining of the page before any html or javascrpt tag.

does anyone has an idea what could be the problem????? I was thinking that maybe is a php configuration or something. how can I configure it do It ccould work just like before.

thanks

LordShryku

No, not exactly a configuration problem. Why do you want to put javascript before starting the session? You can't do header functions after the headers are sent.

narked

this time I really need to put the javascript before the session start. the page is an interactive exam thing. and i work with session to track the limit time and the correct answers., the problem is that users are stupid and they hit the back button and loose their exam so they get a "0" grade. I put a javascript so they cant hit the back button the javascript WORKS but only if its before the session start php command because if i put the javascript after the session start, when hitting the back button the page says it is expired and the javascript dont runs, and if they press the reload button they loose all the exam because the system thinks they allready answered all the questions.

I am wondering why in the server I was before i COULD use header commands after submiting headers.. thats strange.

if there is NO WAY of putting the javascript before, is there a way of telling the browser that the page is not expired if you jit the back button?

LordShryku

You may be able to do it with some output buffering.

narked

sorry for my ignorance but how can I do the output buffering thing> how it works?.. I really apreciate your help

LordShryku

Take a look here

narked

I see... so thats a php.ini configuration option right? I need to request the hosting server admnin to change output buffering to on?
am I right?

narked

ok now I understand.
Im going to try it.