Hi!
I'm doing shopping cart with PHP at the book "Beginning PHP5,Apache and MySQL web development" .

i want to display the number of item that user bought in "cbashop.php"
So, I write the code the same as "cart.php" :

<?php
if (!session_id())
{
session_start();
}
require_once('../Connections/stationery.php');
?>
<?php
        $sessid = session_id();
        $query = "select * from carttemp where carttemp_sess = '$sessid'";
        $results = mysql_query($query) or die(mysql_query());
        $rows = mysql_num_rows($results);
        echo $rows;
    ?>

But in the cbashop.php. It display th error:
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\php\html\Products_Pages\products.php:5) in C:\php\html\Products_Pages\cart12.php on line 4

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\php\html\Products_Pages\products.php:5) in C:\php\html\Products_Pages\cart12.php on line 4
0

Can u help me to fix the problem?

By the way, Can U show me some ideas if I create username and password for customer ( create account for customer when they buy product). What I have to do?

Thank U for reading my messege.

hello!
May U help me to fix the problem?
I did the tutorial the same as the book, but it still have a problem at session_start();

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\php\html\Products_Pages\cart.php:3) in C:\php\html\Products_Pages\cart.php on line 14

on the page "getprod.php" when I click in the "View Cart" button. It display the error above.

Please, help me.
Thank U a lot.