Doing a shopping cart application using session. it was working fine but suddenly today a problem arrived whenever im trying to add a 2nd item the first one is removed and it gives the following warning..
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/matadije/public_html/cat_process.php:2) in /home/matadije/public_html/cat_process.php on line 3
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/matadije/public_html/cat_process.php:2) in /home/matadije/public_html/cat_process.php on line 3
the first 3 lines of my code is as follows:
<title></title>
<?php
session_start();
You are outputting <title></title> before starting the session, this means that all HTTP headers are already sent and it's impossible to add a session cookie to the response. Move your code up so it looks like:
<?php
session_start();
?>
<title></title>
The session_start() function must be called before any output if you use cookies.
In your case, it seems that you use cookies and the <title></title> output prevent the session_start() to be called.
Notes on the PHP.net documentation :
Note:
To use cookie-based sessions, session_start() must be called before outputing anything to the browser.
Resources :
Session has to be initialized before you print anything (like HTML).
Change your code to
<?php session_start(); ?>
<html>
...
and it will work.
It should be the first line of the page.