PHP - A Problem With Listening Items

So I am just wondering to what music/genres you guys are listening too when working on something. This is somewhat forum game, so I will start. When I am programming something, I am mostly listening to metal (almost all genres of metal, including nu-metal and metalcore). Right now I am listening to Sabaton - Primo Victoria

I'm trying to make a page with multiple $_GET situations

example if my user wants to log out, he clicks the loggout link which sends him to
user.php?v=dc

if($_GET['v']=="dc") { session_destroy(); exit; }
if(isset($_GET['v'])=="dc") { session_destroy(); exit; }

but it seems no matter where the user goes it destroys the session.

if($_GET['v']=="mail") { // show mail }

but instead it does what's in $_GET['v']=="dc"

<?php

if(isset($_GET["v"])=="dc"){

if($_SESSION[user]=='Guest'){

echo "You are not logged in fool.";

exit;

}else{

echo "Session closed!";

session_destroy();

}

}

?>
That above doesn't work, when I go elsewhere it still destroy the session... no matter if it's a guest or not. If I go to ($_GET['v']=="godknows") as a user and not a guest, it will destroy the session.

I get the strangest errors...
S.O.S

I have a webpage where all the database items are displyes in a table format.The table also has a check box.Upon clicking the delete button i need to delete all the items whish has the checkbox checked.
How will i do that

Hi all I am having troubles integrating a shopping cart.
$action = (isset($_GET['action']) && $_GET['action'] != '') ? $_GET['action'] : 'view';
switch ($action) {
    case 'add' :
        addToCart();
        break;
    case 'update' :
        updateCart();
        break;
    case 'delete' :
        deleteFromCart();
        break;
    case 'view' :
}

Allows me to Delete and Update but not Add an item.

[php]$action = (isset($_POST['action']) && $_POST['action'] != '') ? $_POST['action'] : 'view';
Allows me to ADD an item to the cart(add action passed from previous page via form)  but not Delete or UPDATE

Im not sure if I should have attached the pages or just pasted them but heres the code

cart.php

<?php
require_once 'config.php';
require_once 'cart-functions2.php';
require_once 'functions.php';
require_once 'database.php';
$ID = $_POST["ID"];
$pSize = $_POST["size"];
$pcolour = $_POST["colour"];
?>
<?php
$action = (isset($_GET['action']) && $_GET['action'] != '') ? $_GET['action'] : 'view';
switch ($action) {
    case 'add' :
        addToCart();
        break;
    case 'update' :
        updateCart();
        break;
    case 'delete' :
        deleteFromCart();
        break;
    case 'view' :
}
$ID = $_POST["ID"];
$cartContent = getCartContent();
$numItem = count($cartContent);

$pageTitle = 'Shopping Cart';


// show the error message ( if we have any )
displayError();

if ($numItem > 0 ) {
?>
<form action="<?php echo $_SERVER['PHP_SELF'] . "?action=update"; ?>" method="post" name="frmCart" id="frmCart">
<table width="780" border="0" align="center" cellpadding="5" cellspacing="1" class="entryTable">
  <tr class="entryTableHeader">
   <td colspan="2" align="center">Item</td>
   <td align="center">Unit Price</td>
   <td width="75" align="center">Quantity</td>
   <td align="center">Total</td>
  <td width="75" align="center">&nbsp;</td>
</tr>
<?php
$subTotal = 0;
for ($i = 0; $i < $numItem; $i++) {
    extract($cartContent[$i]);
    $productUrl = "index.php";
    $subTotal += $price * $ct_qty;
?>
<tr class="content">
  <td width="80" align="center"></td>
  <td><?php echo $pDesc; ?></td>
   <td align="right"><?php echo displayAmount($price); ?></td>
  <td width="75"><input name="txtQty[]" type="text" id="txtQty[]" size="5" value="<?php echo $ct_qty; ?>" class="box" onKeyUp="checkNumber(this);">
  <input name="hidCartId[]" type="hidden" value="<?php echo $ct_id; ?>">
  <input name="hidProductId[]" type="hidden" value="<?php echo $ID; ?>">
  </td>
  <td align="right"><?php echo displayAmount($price * $ct_qty); ?></td>
  <td width="75" align="center"> <input name="btnDelete" type="button" id="btnDelete" value="Delete" onClick="window.location.href='<?php echo $_SERVER['PHP_SELF'] . "?action=delete&cid=$ct_id"; ?>';" class="box">
  </td>
</tr>
<?php
}
?>


cart-functions

<?php
require_once 'config.php';

/*********************************************************
*                 SHOPPING CART FUNCTIONS
*********************************************************/

function addToCart()
{
$sid = session_id();
$ID = $_GET["ID"];
$pSize = $_GET["size"];
$pcolour = $_GET["colour"];   
    
    // current session id
    
    
    // check if the product is already
    // in cart table for this session
    $sql = "SELECT ID
            FROM cart
            WHERE ID = '$ID' AND ct_session_id = '$sid'";
    $result = dbQuery($sql);
    
    if (dbNumRows($result) == 0) {
        // put the product in cart table
        $sql = "INSERT INTO cart (ID, ct_qty, ct_session_id, ct_date)
                VALUES ('$ID', 1, '$sid', NOW())";
        $result = dbQuery($sql);
    } else {
        // update product quantity in cart table
        $sql = "UPDATE cart
                SET ct_qty = ct_qty + 1
                WHERE ct_session_id = '$sid' AND ID = '$ID'";        
                
        $result = dbQuery($sql);        
    }    
   
    header('Location: cart2.php'); 
                 
}

/*
    Get all item in current session
    from shopping cart table
*/
function getCartContent()
{
    $cartContent = array();

    $sid = session_id();
    $sql = "SELECT ct.ct_id, ct.ID, ct.ct_size, ct.ct_colour, ct.ct_qty, pd.pDesc, pd.price, pd.ID
            FROM cart ct, products pd
            WHERE ct_session_id = '$sid' AND ct.ID = pd.ID"; 
    
    $result = dbQuery($sql);
   
    while ($row = dbFetchAssoc($result)) {
    
        $cartContent[] = $row;
    }

    return $cartContent;
}

/*
    Remove an item from the cart
*/
function deleteFromCart($cartId = 0)
{
    if (!$cartId && isset($_GET['cid']) && (int)$_GET['cid'] > 0) {
        $cartId = (int)$_GET['cid'];
    }

    if ($cartId) {    
        $sql  = "DELETE FROM cart
                 WHERE ct_id = $cartId";

        $result = dbQuery($sql);
    }
    
    header('Location: cart2.php');    
}

/*
    Update item quantity in shopping cart
*/
function updateCart()
{
    $cartId     = $_POST['hidCartId'];
    $productId  = $_POST['hidProductId'];
    $itemQty    = $_POST['txtQty'];
    $numItem    = count($itemQty);
    $numDeleted = 0;
    $notice     = '';
    
    for ($i = 0; $i < $numItem; $i++) {
        $newQty = (int)$itemQty[$i];
        if ($newQty < 1) {
            // remove this item from shopping cart
            deleteFromCart($cartId[$i]);    
            $numDeleted += 1;
        }
                            
            // update product quantity
            $sql = "UPDATE cart
                    SET ct_qty = $newQty
                    WHERE ct_id = {$cartId[$i]}";
                
            dbQuery($sql);
       
    }

    exit;
}

function isCartEmpty()
{
    $isEmpty = false;
    
    $sid = session_id();
    $sql = "SELECT ct_id
            FROM cart ct
            WHERE ct_session_id = '$sid'";
    
    $result = dbQuery($sql);
    
    if (dbNumRows($result) == 0) {
        $isEmpty = true;
    }    
    
    return $isEmpty;
}

/*
    Delete all cart entries older than one day
*/
function deleteAbandonedCart()
{
    $yesterday = date('Y-m-d H:i:s', mktime(0,0,0, date('m'), date('d') - 1, date('Y')));
    $sql = "DELETE FROM cart
            WHERE ct_date < '$yesterday'";
    dbQuery($sql);        
}

?> 


Thanks in advance

I have a problem that occurred only recently, apparently by some change my webhost made on the server.
Some time ago I wrote a script that simulates a Poedit-type editor. The script has about 1500 textareas (the translation fields) with unique names, dynamically generated.
All worked fine. Now suddenly I get errors (see below) when I use more than 1000 textareas. It is not a problem of $_POST size, if happens also with empty textareas.
I will show here a simple php test file that I called testta.php, which creates the same error as my much more complicated real script:
 
Code: [Select]
<?php
if(isset($_POST['test'])) {
    echo 'The textareas were posted successfully!<br>';
}
$max = 1500;
echo '<form action="testta.php" method="POST">';
echo '<input type="submit" name="test" value="Submit"><br>';
for($i=0; $i < $max; $i++) {
    echo '<textarea name="test'.$i.'">name is test'.$i.'</textarea><br>';
}
echo '</form>';
?>
The error message generated in the browser:
500 Server Error: A misconfiguration on the server caused a hiccup. Check the server logs, fix the problem, then try again.

From the Apache log file:
[Sat Apr 28 12:47:48 2012] [error] [client 93.172.175.50] Premature end of script headers: testta.php, referer: http://****/*****/testta.php 
(stars added for privacy)

When $max is set to a number < 1000 it works.
On the web I have only found answers that deal with max size of posts, but as I mentioned that is not my case.
My webhost can't help me out either. Until last Friday all worked fine.
Does anyone know what server setting could create this problem?

Thanks in advance,
Kathy