Remove item from session onClick

Question

I'm trying to remove an item from a sort of shopping cart. The items are saved to a session when they are "saved to the shopping cart".

But now I would like to be able to remove certain items from this "shopping cart". Because I got the script from here (stackoverflow) I'm not that familiar with the code. I saw some answers on google and here that described using unset to delete the entry from the session. But I wouldn't know where to start with this one. If additional information is needed please let me know. Thanks for having a look at my question...

Here is the HTML (nothing special):

<div class="txtHint"></div>

This is my script:

$('.add-product').click(function() {
        var productName = $(this).data('product');
            $.post('example.com/reload.php', {productName: productName}, function(data) {
            $('.txtHint').html(data);
        })
    });

This is my reload.php file:

<?php

session_start();

if (!array_key_exists('products', $_SESSION) || !is_array($_SESSION['products'])) {
    $_SESSION['products'] = [];
}

$productName = array_key_exists('productName', $_POST) ? (string) $_POST['productName'] : '';

if ($productName) {
    $_SESSION['products'][] = $productName;
}
?>

<h4>Saved Items</h4>
  <?php foreach ($_SESSION['products'] as $product): ?>
    <div class="echo-product"><i style="color:#F60;padding-right:20px;" class="fa fa-anchor" aria-hidden="true"></i><?php echo htmlspecialchars($product); ?></div>
    <?php endforeach;?>

Updated code: As suggested by Bert Maurau (I Hope).

<?php

session_start();

if (!array_key_exists('products', $_SESSION) || !is_array($_SESSION['products'])) {
    $_SESSION['products'] = [];
}

$productName = array_key_exists('productName', $_POST) ? (string) $_POST['productName'] : '';

if(isset($_GET['delparam'])){
   unset($_SESSION['products'][$productName]);
}
if(isset($_GET['addparam'])){
    $_SESSION['products'][] = $productName;
}
?>

If I use this it doesn't add any new items...

Possible duplicate of [How to remove a variable from a PHP session array](http://stackoverflow.com/questions/2231332/how-to-remove-a-variable-from-a-php-session-array) — A.Sharma, Jul 25 '16 at 12:34
To remove a product you should compage if your requested product is in your array and remove it. Something like that: `if($_SESSION['products'][$_POST['productName']] == $_POST['productName']) { unset($_SESSION['products'][$_POST['productName']]); }` To be more easy you should create some controller for each action. Like add, delete, etc... — Ersian, Jul 25 '16 at 12:40
Thanks. The problem is that this isn't my code. So I don't know where to add controllers and such. But I will look in to you answer. — Steggie, Jul 25 '16 at 12:43

Bert Maurau · Accepted Answer · 2016-07-25T12:44:43.310

4

You should be able to do:

unset($_SESSION['products'][$productName]);

This wil unset the array_key and its values that matches your productName.

Edit: Code for using the unset

HTML:

$('.delete-product').click(function() {
  var productName = $(this).data('product');
  $.post('example.com/reload.php?delparam', {productName: productName}, function(data) {
  })
});

Reload.php (after $productName)

if(isset($_GET['delparam'])){
   unset($_SESSION['products'][$productName]);
}
if(isset($_GET['addparam'])){
   //code for adding product
}

edited Jul 25 '16 at 12:44

answered Jul 25 '16 at 12:36

Bert Maurau

979
5
21

Thanks for your answer. Should I place your bit of code in my `reload.php` file? And how do I use the unset to react to a button click? – Steggie Jul 25 '16 at 12:39
Could you please look at my updated code in my OP? @Bert Maurau. I'm probably being a real noob here.. – Steggie Jul 25 '16 at 12:51
That should work. You just have to edit your .add-product call to: $.post('example.com/reload.php?addparam' – Bert Maurau Jul 25 '16 at 15:39
Hi Bert Maurau, I did what you said and changed the .add-product to `reload.php?addparam` but it did not "save" the item. – Steggie Jul 25 '16 at 15:53
Your code looks fine. Do you get any output if you put a die(var_dump(..)) of your session/post in your addparam check to make your sure it gets called? – Bert Maurau Jul 26 '16 at 06:40
Hi Bert, Could you tell me how to do that? – Steggie Jul 26 '16 at 07:35
If I look at my console I do see this: `POST XHR http://example.com/reload.php [HTTP/1.1 200 OK 42ms] ` – Steggie Jul 26 '16 at 07:45
Ok it adds the Item now. But it does not delete it when I click the button. HTML of the button: `x` – Steggie Jul 26 '16 at 07:50
If you still would like to see a var dump: `array(2) { ["Item Z"]=> string(6) "Item Z" ["Ivan Frank"]=> string(10) "Ivan Frank" }` This is selecting 2 items @Bert Maurau – Steggie Jul 26 '16 at 13:26
If you do var_dump($_SESSION['products'][$productName]) you should get your desired value. Also, with your delete did you also add the required onClick code that calls the reload.php?delparam ? Because the above code should do the trick – Bert Maurau Jul 27 '16 at 08:36

Remove item from session onClick

1 Answers1