$_SESSION field will not update

[Freedom-n-Democrazy]

I have a problem where the session field quantity is not updating when the same entity key (id) is added to the session. Instead of quantity being updated, another identical entity is being added to the session.

I am TOTALLY out of clues on this one! Does anyone have any idea what is causing this to happen?

 

<?php
session_start();
if ($_SESSION['cart']['content']['id'] == $_POST['id']) {
	$_SESSION['cart']['content']['$_POST[id]']['quantity'] = $_SESSION['cart']['content']['$_POST[id]']['quantity'] + $_POST['quantity'];
} else {
	$_SESSION['cart']['content'][] = array ('id' => $_POST['id'], 'size' => $_POST['size'], 'quantity' => $_POST['quantity']);
}
echo '<DIV class="result">Added to cart.</DIV>';
?>

[awjudd]

http://php.net/string

 

More specifically this piece right here: '$_POST[id]'.  That will always return the same value.  if you echo it you will see that it is saying $_POST[id] exactly how you have it.

 

<?php
session_start();
if ($_SESSION['cart']['content']['id'] == $_POST['id']) {
	$_SESSION['cart']['content'][$_POST['id']]['quantity'] = $_SESSION['cart']['content'][$_POST['id']]['quantity'] + $_POST['quantity'];
} else {
                            /* You were just appending it to the array but you are doing a search for it above so you need the actual id as the index */
	$_SESSION['cart']['content'][$_POST['id']] = array ('id' => $_POST['id'], 'size' => $_POST['size'], 'quantity' => $_POST['quantity']);
}
echo '<DIV class="result">Added to cart.</DIV>';
?>

 

~juddster

[Freedom-n-Democrazy]

echo $_SESSION['cart']['content'][$_POST['id']]['quantity'];

and

 

echo $_SESSION['cart']['content'][$_POST[id]]['quantity'];

... are both giving me the same result, which are both correct.

[awjudd]

$_POST[id] will give you a warning (if you have error reporting displaying them) because it has to automagically convert id to 'id'.  If you have a $_POST'd value that has a space or anything in it (i.e. $_POST [ 'foo bar' ]) then it won't work.

 

You should always use the quotes rather than not because it is incredibly slower (about 4 times).

 

~juddster

[Freedom-n-Democrazy]

Your right. I remember seeing PHP assume in my error log file last week over the same thing. Thanks dude.

 

Do you know why quantity is not updating in the code?

[awjudd]

What is it doing instead?

 

~juddster

[Freedom-n-Democrazy]

Its adding another identitcal entity when It should updaing the quantity to 2:

http://i56.tinypic.com/s44ef9.png

 

I cannot understand why...... not 1 bit!

[awjudd]

if ($_SESSION['cart']['content']['id'] == $_POST['id']) {

 

Should be:

 

if ( isset ( $_SESSION [ 'cart' ] [ 'content' ] [ $_POST [ 'id' ] ) ) {

 

~juddster

[Freedom-n-Democrazy]

You mean:

if ( isset ( $_SESSION [ 'cart' ] [ 'content' ] [ $_POST [ 'id' ] ) ) {

 

 

Thanks allot dude!

[Freedom-n-Democrazy]

Unfortunately, I spoke too soon. Now another problem has developed.

 

If I add an entity with a quantity of 1, and then add the same entity with a quantity of 1, I get a single entity with a quantity of 2, however,

If I add an entity with a quantity of 1, and then add the same entity with a quantity of 3, I get two entities - entity A/quantity-1 & entity A/quantity-3.

 

Why is this happening?

 

http://i52.tinypic.com/30bgtww.png

 

<?php
session_start();
if (isset($_SESSION['cart']['content'][$_POST['id']])) {
	$_SESSION['cart']['content'][$_POST[id]]['quantity'] += $_POST['quantity'];
} else {
	$_SESSION['cart']['content'][] = array ('id' => $_POST['id'], 'size' => $_POST['size'], 'quantity' => $_POST['quantity']);
}
echo '<DIV class="result">Added to cart.</DIV>';
echo $_SESSION['cart']['content'][$_POST['id']]['quantity'];
?>

[Freedom-n-Democrazy]

Never mind. I have re-wrote the way entities are stored in the session. They are now stored as:

$_SESSION['cart']['content'][$_POST[id]][$_POST[size]] = array ('quantity' => $_POST['quantity'])

 

opposed to:

$_SESSION['cart']['content'][] = array ('id' => $_POST['id'], 'size' => $_POST['size'], 'quantity' => $_POST['quantity'])

 

EDIT: Well, this is flawed. But I will figure it out.

[awjudd]

Because you still just appending to the end of the array when you should be doing as I said and:

 

$_SESSION['cart']['content'][$_POST['id']] = array ('id' => $_POST['id'], 'size' => $_POST['size'], 'quantity' => $_POST['quantity']);

 

~juddster