Problem With an Associative Array in a Shopping Cart

[anointing]

Hi,

 

I'm, designing my first simple php shopping cart. Ultimately, I want the cart to add and delete items contained in an associative array. I'm currently testing using a simple associative array, $test which is initialized with 3 elements. A form calls process.php which displays the contents of $test. When an item is selected for deletion, process.php is again called with info added to the url: href='process.php?action=delete&id=" .$key. "'...

 

Process.php displays the item reference, the item name and a link to delete the item. This is what it displays on the first call as it loops through the 3 elements of the array:

 

Cake reference: BCL-1000 Name: Barbie Doll Remove item            Remove item

Cake reference: BCL-1001 Name: Action Man                     Remove item

Cake reference: BCL-1002 Name: Humpty Dumpty                     Remove item

 

Process.php then deletes the item from the array using unset(). It then loops through $test using a foreach function and displays the contents of the array.

 

When I select the first link which deletes item id=1000, this is what I get:

 

Cake reference: BCL-                                                   Remove item

Cake reference: BCL-1001     Name: Action Man                   Remove item

Cake reference: BCL-1002     Name: Humpty Dumpty           Remove item

 

The curious thing is, even after the item is deleted, the foreach method loops through 3 times as though there are still 3 elements in the $test array. But it echos 2 using <?php echo count($test); ?>

 

I find this really strange and frustrating. Guys, I need your help. Here's the coding:

 

==========

 

<?php

session_start();

 

$test= array("1000" => "Name: Barbie Doll", "1001" => "Name: Action Man", "1002" => "Name: Humpty Dumpty");

$_SESSION['test'] = $test;

 

$action = $_POST['action'];

 

$cake_id = $_POST['cake_id'];

$name = $_POST['cake_name'];

$order = $_POST['order_details'];

$price = $_POST['total_cost'];

$quantity = $_POST['quantity'];

 

?>

.

.

.

<?php                 

                 

      if($_GET['action']=="add")

      {                   

 

            foreach($test as $key=>$value)

            { 

                    echo "<tr bgcolor='#ffffff'>";

                    echo "<td class='normal'>Cake reference: BCL-" .$key. "</td>";

                    echo "<td class='normal'>" .$value. "</td>";

                    echo "<td class='normal'><a class='cartlinks' href='process.php?action=delete&id=" .$key. "'>Remove item</a></td>";

                    echo "</tr>";

            }     

      }

 

      if($_GET['action']=="delete")

      {                       

           

            unset($test[$_GET['id']]);                     

 

            foreach($test as $key=>$value)

            { 

                if($key != "")

                {

                    echo "<tr bgcolor='#ffffff'>";

                    echo "<td class='normal'>Cake reference: BCL-" .$key. "</td>";

                    echo "<td class='normal'>" .$value. "</td>";

                    echo "<td class='normal'><a class='cartlinks' href='process.php?delete='" .$key. "'>Remove item</a></td>";

                    echo "</tr>";

                }

            }                 

       

 

      }

 

       

?>

 

<?php

          <tr><td class="totalprice">£<?php echo count($test); ?></td></tr>

?>

 

 

 

 

[blinky001]

In your test (other than the fact you don't use your session variable for the loops...)

 

the line

 

echo "<td class='normal'><a class='cartlinks' href='process.php?delete='" .$key. "'>Remove item[/url]</td>";

 

has the wrong quotes around the $key variable - you only need the double ones:

 

Perhaps try:

 

<?php
session_start();

if(!isset($_SESSION['test']))
{
$_SESSION['test'] = array(
	"1000" => "Name: Barbie Doll", 
	"1001" => "Name: Action Man", 
	"1002" => "Name: Humpty Dumpty"
);
}

$action = $_POST['action'];

$cake_id	= $_POST['cake_id'];
$name		= $_POST['cake_name'];
$order		= $_POST['order_details'];
$price		= $_POST['total_cost'];
$quantity	= $_POST['quantity'];

echo '<table>';

if($_GET['action'] == "delete")
{
unset($_SESSION['test'][$_GET['id']]);

foreach($_SESSION['test'] as $key => $value)
{   
	if($key != "")
	{
		echo "<tr bgcolor='#ffffff'>";
		echo "<td class='normal'>Cake reference: BCL-".$key."</td>";
		echo "<td class='normal'>".$value."</td>";
		echo "<td class='normal'><a class='cartlinks' href='dum.php?delete=".$key.">Remove item</td>";
		echo "</tr>";
	}
}
}
       
?>

<tr><td class="totalprice">£<?php echo count($_SESSION['test']); ?></td></tr>

</table>

 

Hope this helps.

 

Paul

 

 

[anointing]

Hi,

 

I've tried just using the double quotes but it has made no diffference. The real problem is that when I delete an element, then use the foreach method to display the array, the array does not subtract the deletion. It cycles through 3 times as before, displaying null values for the deleted key / value pairs of the supposedly deleted element. Very odd.