PHP Session multidimensional array not getting assigned any values

Question

After a button is being pressed, 3 values are put in into a multidimensional array in PHP. I've checked the values before assigning in the same brackets and it seems to have the correct value. However, when I add the values like this:

if (isset($_POST['add_to_cart'])) {
    $count = count($_SESSION['shopping_cart']);
    echo "Count: $count<br />";

    $_SESSION['shopping_cart'][$count]['product_id'] = $_POST['product_id'];
    $_SESSION['shopping_cart'][$count]['tier'] = $_POST['tier'];
    $_SESSION['shopping_cart'][$count]['division'] = $_POST['division'];
}

The output shows that the array $_SESSION['shopping_cart'] is empty and has no values.

if (empty($_SESSION['shopping_cart'])) {
    echo "Your cart is empty.<br />";
}
else {
    //Display products in cart
    foreach($_SESSION['shopping_cart'] as $id => $product) {
        echo $product['tier'] . $product['division'] . "<br />";
    }
}

I've came to the conclusion that I assign the values in a wrong way. What am I doing wrong? Thanks for the help!

EDIT: forgot to add that the array is already initialized at the beginning!

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

Is it possible that $_SESSION['shopping_cart'] is never initialized like so: $_SESSION['shopping_cart'] = array(); — Will
– Will, Commented Mar 30, 2016 at 23:19
@Will thanks for writing, I forgot to add that to the post, It's already initialized. — user2283719
– user2283719, Commented Mar 30, 2016 at 23:22
No prob. And you're also calling session_start();? I think we might need to see more of the code. — Will
– Will, Commented Mar 30, 2016 at 23:25
Wow that was it @Will Thanks so much for the help. It's my first day programming with PHP so I'm a beginner, going to add the answer to the question. — user2283719
– user2283719, Commented Mar 30, 2016 at 23:27
You should not use count($_SESSION['shopping_cart']) as an index for its elements. If the cart has three items, $_SESSION['shopping_cart'][$count]['product_id'] will try to get $_SESSION['shopping_cart'][3]['product_id'] which does not exist. — dlicheva
– dlicheva, Commented Mar 30, 2016 at 23:28

user2283719 · Accepted Answer · 2016-03-30 23:29:20Z

3

I forgot to add the session_start(); to the code. That's why the Session array didn't work! Thanks for the help @Will

answered Mar 30, 2016 at 23:29

user2283719

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user2283719 Over a year ago

Yes, I was trying but can't until tomorrow since stackoverflow said that I can only accept my own answer after 2 days.

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