[SOLVED] php shopping cart giving me grief :@(

[capstin]

Hello fellow php'ers...  I am having a little trouble in my design of a shopping cart for a website i am putting together.  It has had me baffled for weeks now.  Below is the demo link i have been using for testing my components.  I basically have an html page splite into 3 sections...  One for a search, two for search results and three for my shopping cart.  If (when the page loads) i add/remove a song to/from my shopping cart it works fine.  But, if i do a new search and add a new song my cart goes way wonky!  Have a bash at it using the link below... Any help would be most welcome.  It is driving me insane!  I just can't work out why executing the same set of code would produce different results.

 

http://www.capstinpole.co.uk/picknclick-demo/nutsnbolts/switch.php (select the bottom option All.hmtl...) - The switch.php page resets my $_SESSION arrays to default.

 

If you need anymore info on this please let me know...

A massive selection box in the post for the one who solves the mystery.

 

Please note: I am fairly new to all this programming so no laughing!

 

Best wishes!

 

Michael

 

 

 

 

 

 

[PHP_PhREEEk]

We can't trouble shoot code by visiting a link... you gotta post the code! I would assume a shopping cart would be a fairly big chunk of code, so try and keep it to what's most likely relevant if you have an idea where the problem lies.

 

PhREEEk

[capstin]

no probs... 

 

cart.php receives the following variables...

 

<form action="cart.php" method="post" name="CartGoodies" target="FooterFrame">

        <input name="item_no" type="hidden" value="<? echo $item_no; ?>">

        <input name="artist" type="hidden" value="<? echo $artist; ?>">

        <input name="song" type="hidden" value="<? echo $song; ?>">

        <input name="Submit" type="submit" class="style10" value="Add to cart" />

        <input name="manufact" type="hidden" value="<? echo $manufact; ?>">

        <input name="cost" type="hidden" value="<? echo $cost; ?>">

      </form> 

 

 

-------------------------------------------

cart.php script...

 

<?

$_SESSION['total'] = 0.00; // Accumulates Cost

$count = $_SESSION['rec_count'];

$dup_chk = $_POST['item_no'];

 

//

if (!empty($_POST['artist'])) {

 

for ($c = 1; $c < $count; $c++) {

 

if ($_SESSION['item_no'][$c] == $dup_chk) {

 

// checking for duplicate cart entries...                                       $_SESSION['qty'][$c] +=1;

$_SESSION['amount_adj'][$c] = (float) $_POST['cost'] * $_SESSION['qty'][$c];

$_SESSION['artist'][$count] = "";

$c = $count;

 

}

 

else {

 

//no duplicates found... Add contents to session var's...                           $_SESSION['item_no'][$count] = $_POST['item_no'];

$_SESSION['artist'][$count] = $_POST['artist'];

$_SESSION['song'][$count] = $_POST['song'];

$_SESSION['manufact'][$count] = $_POST['manufact'];

$_SESSION['qty'][$count] = 1;

$_SESSION['amount_adj'][$count] = $_POST['cost'];

}

}

}

 

if ($count == 1){

 

//Check for first run... * * * * * * * * * * * * * * * *

$_SESSION['item_no'][$count] = $_POST['item_no'];

$_SESSION['artist'][$count] = $_POST['artist'];

$_SESSION['song'][$count] = $_POST['song'];

$_SESSION['manufact'][$count] = $_POST['manufact'];

$_SESSION['qty'][$count] = 1;

$_SESSION['amount_adj'][$count] = $_POST['cost'];

 

}

 

 

//Remove Item ... $remove is passed through the browser - <a href="cart.php?remove=<? echo $i+1; ?>

                          if (!empty($remove)){

 

//variable wipeouts

unset($_SESSION['item_no'][$remove]);

unset($_SESSION['artist'][$remove]);

unset($_SESSION['song'][$remove]);

unset($_SESSION['manufact'][$remove]);

unset($_SESSION['qty'][$remove]);

unset($_SESSION['amount_adj'][$remove]);

}

 

// Display Cart contents >>> 

$i=0;

while ($i < $count) {

 

If (empty($_SESSION['artist'][$i+1])) {

$i++;

$msg5 = "Artist $i is empty - statements executed.";

}

 

else {

               // draw html row

 

Hope this helps...

 

Thanks for support!

 

Michael