session_start() and header()

Hi!
Before, I had this problem with session_start() - Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\Users\Administrador\Documents\xampp\htdocs\login.php:1) in C:\Users\Administrador\Documents\xampp\htdocs\login.php on line 3

I've been surfing a bunch of php forums and they all say that i can't have any blank spaces before <?php tag. I've corrected it and now... nothing happens! It doesn't send the error message, but nothing happens!

The purpose is that, after a correct login, it opens a new window with the current user's name. but the new page doesn't open.
If I create a regular html link (with <a>), i manage to open the new page, but the session user name is not sent.

Can anyone help me, please??!

 

So it never gets to the header()?

Try, if(!empty($_SESSION['nome']))

Are you sure, $user is being filled so that $_SESSION['nome'] is getting the value?

Echo all of the values to make sure they are filled.

 

At the end of the script, insert:

ob_flush ( );

And the error will magically go away. Hopefully. =)

 

Just as a matter of preventing injections, you'll probably want to clean all data that you post from a user form, especially if it interacts with a mysql_query.

This can be done via htmlspecialchars()
http://php.net/manual/en/function.htmlspecialchars.php
or
mysql_real_escape_string()
http://php.net/manual/en/function.mysql-real-escape-string.php

(I realize this has nothing to do with your question though)

 

Hi,

I'm not a php expert but im sure i experienced the exact same problem. Have you tried putting session_start(); first followed by ob_start();

i.e.:

<?php
session_start();
ob_start();

Code (markup):

 

maybe some extrace ascii chars before <?php

 

Sometimes it happens when /tmp folder is full if you see this error on all of your php based sites. Thats what I have experienced

 

Ah my favourite error (partially)

Well straight to the point!
Just as chtdatweb said,

<?php
session_start();
ob_start();

Code (markup):

should do the trick! (At least it works for me)

 

^^ it really doesn't solve it, how about all files having errors like that? you should check error like this:

Uploaded with ImageShack.us

 

wow that looks like the old EDIT you used to get with DOS. Anyhow, what editor are you using to save your php file?