PHP- undefined Index

[seni786]

Hi

i am having problems with some code that i wrote out for a shopping cart. the shopping cart it self works when a product is added but when the 'CART CONTENT' button is clicked on it comes up with an error. the error is

Notice: Undefined index: action in D:\www\students \khank\WebsiteF inal1SHAZAD\car t.php on line 5

the code that i have written for this is

[code=php]
<?php

include("databa se.php");

switch($_GET["action"])
{
case "add_item":
{
AddItem($_GET["id"], $_GET["qty"]);
ShowCart();
break;
}
case "update_ite m":
{
UpdateItem($_GE T["id"], $_GET["qty"]);
ShowCart();
break;
}
case "remove_ite m":
{
RemoveItem($_GE T["id"]);
ShowCart();
break;
}
case "default":
{
ShowCart();
}
}

function AddItem($produc tid, $qty)
{
// Will check whether or not this item
// already exists in the cart table.
// If it does, the UpdateItem function
// will be called instead

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

$result = mysql_query("se lect count(*) from cart where cookieid = '" . GetCartId() . "'");
$row = mysql_fetch_row ($result);
$numRows = $row[0];

if($numRows == 0)
{
// This item doesn't exist in the users cart,
// we will add it with an insert query
@mysql_query("i nsert into cart(cookieid,p roductid,qty) values('" . GetCartId() . "',$productid,$ qty)") or die(mysql_error ());
}
else
{
// This item already exists in the users cart,
// we will update it instead

UpdateItem($pro ductid, $qty);
}
}

function UpdateItem($pro ductid, $qty)
{
// Updates the quantity of an item in the users cart.
// If the qutnaity is zero, then RemoveItem will be
// called instead

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

if($qty == 0)
{
// Remove the item from the users cart
RemoveItem($pro ductid);
}
else
{
mysql_query("up date cart set qty = $qty where cookieid = '" . GetCartId() . "' and productid = $productid");
}
}

function RemoveItem($pro ductid)
{
// Uses an SQL delete statement to remove an item from
// the users cart

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

mysql_query("de lete from cart where cookieid = '" . GetCartId() . "' and productid = $productid");
}

function ShowCart()
{
// Gets each item from the cart table and display them in
// a tabulated format, as well as a final total for the cart

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

$totalCost = 0;
$result = mysql_query("se lect * from cart c join products p on c.productid = p.productid where c.cookieid = '" . GetCartId() . "'");
//$result = mysql_query("se lect * from cart c inner join products p on c.productid = p.productid");
?>
[/code]

the error comes on line five with the 'SWITCH STATEMENT'. i don't know what to do. Can any one please help. it would be very much appreciated.

[Atli]

Hi, and welcome to TSDN.

This is not an really an error, it is a notice. It is displayed because the GET variable 'action' is empty, so when you attempt to read $_GET['action'] the 'action' field of the array doesn't exist. Ergo, you get a undefined index notice.

[Atli]

I've edited the thread's title to better describe it's contents.

Please read the Posting Guidelines before posing.

MODERATOR

[pbmods]

You can turn off this notice by either editing your php.ini file, or by calling:

[code=php]error_reporting (~E_NOTICE);[/code]

http://www.php.net/manual/en/ref.errorfunc.php#ini.error-reporting

[seni786]

PHP- undefined Index

hi
im still having problems with resolving this issue, anyone know of any solutions.

[code=php]
<?php

include("databa se.php");

switch($action)
{
case "add_item":
{
AddItem($_GET["id"], $_GET["qty"]);
ShowCart();
break;
}
case "update_ite m":
{
UpdateItem($_GE T["id"], $_GET["qty"]);
ShowCart();
break;
}
case "remove_ite m":
{
RemoveItem($_GE T["id"]);
ShowCart();
break;
}
case "default":
{
ShowCart();
}
}

function AddItem($produc tid, $qty)
{
// Will check whether or not this item
// already exists in the cart table.
// If it does, the UpdateItem function
// will be called instead

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

$result = mysql_query("se lect count(*) from cart where cookieid = '" . GetCartId() . "'");
$row = mysql_fetch_row ($result);
$numRows = $row[0];

if($numRows == 0)
{
// This item doesn't exist in the users cart,
// we will add it with an insert query
@mysql_query("i nsert into cart(cookieid,p roductid,qty) values('" . GetCartId() . "',$productid,$ qty)") or die(mysql_error ());
}
else
{
// This item already exists in the users cart,
// we will update it instead

UpdateItem($pro ductid, $qty);
}
}

function UpdateItem($pro ductid, $qty)
{
// Updates the quantity of an item in the users cart.
// If the qutnaity is zero, then RemoveItem will be
// called instead

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

if($qty == 0)
{
// Remove the item from the users cart
RemoveItem($pro ductid);
}
else
{
mysql_query("up date cart set qty = $qty where cookieid = '" . GetCartId() . "' and productid = $productid");
}
}

function RemoveItem($pro ductid)
{
// Uses an SQL delete statement to remove an item from
// the users cart

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

mysql_query("de lete from cart where cookieid = '" . GetCartId() . "' and productid = $productid");
}

function ShowCart()
{
// Gets each item from the cart table and display them in
// a tabulated format, as well as a final total for the cart

global $host, $user, $pass;

// Get a connection to the database
$cxn = @mysql_connect( "$host", "$user", "$pass");

$totalCost = 0;
$result = mysql_query("se lect * from cart c join products p on c.productid = p.productid where c.cookieid = '" . GetCartId() . "'");
//$result = mysql_query("se lect * from cart c inner join products p on c.productid = p.productid");
?>[/code]

[Please use CODE tags when posting source code. Thanks! --pbmods]

[seni786]

me is still having problems, any got any solutions?????? ?????????

[JosAH]

I found this question in the Editor's Corner; I think this forum is a more appropriate place for it.

kind regards,

Jos

[pbmods]

Merged duplicate threads.

[pbmods]

You can turn off this notice by either editing your php.ini file, or by calling:

[code=php]error_reporting (~E_NOTICE);[/code]

http://www.php.net/manual/en/ref.errorfunc.php#ini.error-reporting