help with sessions/simple shopping cart

[brash21]

Ive been playing around with a simple shopping cart and sessions. I want the script to echo the amount everytime someone hits the add to cart button. So I would like the script to keep adding the amounts even for when someone repeatedly hits the button. heres my script:

 

In the head i have:

 

<script>

 

<?

 

session_start();

 

 

$toupeeqty = $_POST['toupeeqty'];

 

$_SESSION['toupee'] = "$toupeeqty";

 

 

 

if(isset($_SESSION['toupee']))

    $_SESSION['toupee'] = $_SESSION['toupee'] + $toupeeqty;

 

else

    $_SESSION['toupee'] = $toupee;

?>

 

and heres what i have in the body:

 

<img src = "toupee.jpg" /><br/>

<form action = "question1.php" method = "post">

How many toupees would you like?<br/>

<input type = "text" name = "toupeeqty" value = "1"/>

<input type = "submit" name = "submit" value = "Add to cart" />

</form><br/><br/>

</br><br/>

Click image to preview the Wild Wacky Action Bike!<br/><br/>

<img src = "wacky.jpg" onclick="previewbike();"/><br/>

<br/><br/>

<form action = "question1.php" method = "post">

How many wild wacky action bikes would you like?<br/>

<input type = "text" name = "wackybikeqty" value = "1"/>

<input type = "submit" name = "submit" value = "Add to cart" />

</form><br/><br/>

 

 

 

<?

 

echo $_SESSION['toupee'];

 

?>

 

Everytime i enter an amount the script just doubles the value. how do i get the script to keep adding amounts entered? thanks in advance

[syntaxerror]

from what i see, every time you hit your the first block or page, you're initializing the

 

toupeeqty in your session variable to what was once previously posted.

 

, you have to make a separate page/block where you initialize the session variable only once

 

eg like

 

if (isset($_SESSION['toupeeqty']){}

else{

 

 

    $_SESSION['toupeeqty'] = $_POST['toupeeqty'];

 

}

 

 

perhaps just initialize the $_SESSION['toupeeqty'] to zero from an initial page/mainpage after login,

and then on all other pages where add to cart is available

 

you'd just do your add block, and not have to reintialize the value of $_SESSION['toupeeqty']