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Posted by Jason Wong on 10/20/79 11:16
On Tuesday 17 May 2005 21:18, mayo wrote:
> I usually work with cold fusion and took on a little project to get my
> feet wet in php and am spinning my wheels. What I thought might be
> difficult was easy and what I thought would be a piece of cake has
> caused me much grief over the last few days.
It appears that your overall problem is a misunderstanding of how arrays
work in PHP and how easy it is to manipulate them.
First:
> if (session_is_registered('ses_basket_items')){
In general, for practical purposes (if PHP is installed using the
recommended default setup, ie register_globals disabled),
session_is_registered() is deprecated and should not be used. Use:
if (isset($_SESSION['ses_basket_items'])) { ... };
Second:
> if ($action == "empty")
> {
> while ($ses_basket_items > -1)
> {
> array_splice ($ses_basket_name,
> $ses_basket_items, 1);
> array_splice ($ses_basket_amount,
> $ses_basket_items, 1);
> array_splice ($ses_basket_price,
> $ses_basket_items, 1);
> array_splice ($ses_basket_id,
> $ses_basket_items, 1);
> $ses_basket_items--;
> }
> }
You seem to be using multiple single dimension arrays to store your basket
details. That is not the optimal way of doing things. You should have a
*single* multi dimension array, there are many ways to do this, here's a
couple:
1)
$basket[1] = array('name' => 'name of product',
'id' => 'product id',
'price' => 'price of product',
'amount' => 'quantity required');
$basket[2] = array('name' => 'name of product',
'id' => 'product id',
'price' => 'price of product',
'amount' => 'quantity required');
2)
$basket['a_product_id'] = array('name' => 'name of product',
'price' => 'price of product',
'amount' => 'quantity required');
$basket['another_product_id'] = array('name' => 'name of product',
'price' => 'price of product',
'amount' => 'quantity required');
OK, so how do you operate on them? In the examples below 2 forms will be
given corresponding to how you defined the arrays as per above.
To remove an item:
1) unset($basket[n]); // where n is an integer
2) unset($basket['product_id']; // if product_id is an integer
// then you don't need the single-quotes
// note that also applies when first
// define the array, ie:
// $basket[product_id] = array(...);
To change an attribute, eg the amount:
1) $basket[n]['amount'] = 5;
2) $basket['product_id'] = 10;
To display an attribute, eg price:
1) echo $basket[n]['price'];
2) echo $basket['product_id']['price'];
When playing around with arrays, print_r() is your friend, use it
liberally.
--
Jason Wong -> Gremlins Associates -> www.gremlins.biz
Open Source Software Systems Integrators
* Web Design & Hosting * Internet & Intranet Applications Development *
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