Unsetting part of a session with a clause

[paul_mellon36]

Hi,
I am having a problem unsettting part of a session in my shoppping basket.
The problem is that the session has 2 parts, an item id and a quantity related to it.
I want to unset this session part if they remove that item from the shopping basket.
The code that is not working is below:

Create the session:

Code:

<?php
session_start();

if(!isset($_SESSION['basket']))
{
$_SESSION['basket'] = array();
}

if(isset($_POST['selected_item_id']))
{
$u_item_id = $_POST['selected_item_id'];
$u_quantity = $_POST['sel_item_qty'];
$u_details = $u_item_id."|".$u_quantity;
$_SESSION['basket'][] = $u_details;
header("Location: showcart.php");
}
?>

Removing part of it:

Code:

// this calls the following code
<td class=border align = center><a href='removefromcart.php?id=$item_id'>Remove</a></td>


<?php
if ($_GET[id] != "")
{
unset($_SESSION['basket'][] == $_GET[id]);
header("Location: showcart.php");
}
else
{
header("Location: shopfront.php");
exit;
}
?>

Very grateful for any help you can give

[VGR]

Code:

unset($_SESSION['basket'][] == $_GET[id]);

!!!???

something like this, perhaps ?

Code:

$b=count($_SESSION['basket']);
$i=0; $notfound=TRUE;
while (($i<$b) AND $notfound) {
  $zar=explode('|',$_SESSION['basket'][$i]);
  $notfound=($_GET['id']<>$zar[0]);
  if ($notfound) $i++;
} // while
if ($notfound) { // not found
  // anything to do ?
} else { // found
  unset($_SESSION['basket'][$i]); // I don't like this, but it's what you ask for
}

If I were you, I would store the basket as a normal two-dimensional array with code like :

Code:

session_start();

if(!isset($_SESSION['basket']))
{
   $_SESSION['basket'] = array();
}

if(isset($_POST['selected_item_id']))
{
   $u_item_id = $_POST['selected_item_id'];
   $u_quantity = $_POST['sel_item_qty'];
   $_SESSION['basket'][] = array('id'=>$u_item_id,'qty'=>$u_quantity);
   header("Location: showcart.php");
}

this would simplify your life a lot, and if ever you want to store it, then it's time to implode() using '|' - or even better, to encode or dump the whole sesison variable -

[paul_mellon36]

ok,
i have adapted your code to use for the session array to display my shopping cart.

Basically i need to display the 2 items in the array, i can display the first half but now i don't know how i get the second (qty).

At present i use this but it doesn't work:

Code:

<?php
session_start();

if(!isset($_SESSION['basket']))
{
$_SESSION['basket'] = array();
}
if(isset($_POST['selected_item_id']))
{
$u_item_id = $_POST['selected_item_id'];
$u_quantity = $_POST['sel_item_qty'];
$_SESSION['basket'][] = array('id'=>$u_item_id,'qty'=>$u_quantity);
header("Location: showcart.php");
}
?>

Code:

for($i = 0; $i < count($_SESSION['basket']); $i++)
{
   $product = $_SESSION['basket'][$i];
   $myarray = implode('|', $product);

when i try to use $myarray[1] i don't get anything

Please help

[paul_mellon36]

its ok i got it, its just the problem of removing it now?(unset)

[VGR]

the access is done via $product_id = $_SESSION['basket'][$i]['id'] and qty=<trhesame>['qty']

to unset it, I think you'd to NOT unset() it, but rather ste the quantity to 0. This way your count() still equals to real number of array elements and to the highest array index present (plus 1)

if you really want to unset() $_SESSION['basket'][$i] you can , but then adapt my suggested snippet of code to nto do for($i=0;$i<count()) { something on element $i } but rather count $i from 0 to until the count()-th element has been found as set - use isset() - because unsetting an array element creates a "hole"

[paul_mellon36]

sorry but i do not understand???

A NOT unset???

could you show me in a code form???

below is the code i have so far:

Code:

//removefromcart.php
<?php

if ($_GET[id] != "")
{


unset($_SESSION['basket'][id] == $_GET[id]);
header("Location: showcart.php");
}
else
{
header("Location: shopfront.php");
exit;
}
?>

Code:

//addtocart.php
<?php
session_start();

if(!isset($_SESSION['basket']))
{
$_SESSION['basket'] = array();
}
if(isset($_POST['selected_item_id']))
{
$u_item_id = $_POST['selected_item_id'];
$u_quantity = $_POST['sel_item_qty'];
$_SESSION['basket'][] = array('id'=>$u_item_id,'qty'=>$u_quantity);
header("Location: showcart.php");
}
?>

[paul_mellon36]

Hi Guys, I am still having trouble with this if anyone could help? it'd be much appreciated

It's just the unset problem

Paul

[VGR]

this is not a MySql question but a PHP one

I suggested you to not unset() a session variable, not to NOT_unset() it :D

I suggested some code changes, and your latest code is a mix of the old one and the new one. I doubt this will work.

your problem is not that complicated

[admin]

VGR,

I have edited your post.  If you want to post the link to your site when appropriate, that is acceptable and allowed, but please do not invite members to move their questions to another site.

Cd&
Site Administrator

[VGR]

complementary