[nabi]

hi

i was wondering if anyone knew how to do calculations in php?
i want to use this to design my first shopping cart.

e.g. when a user clicks on a checkbox, it will automatically recognise that the item is e.g. $30 and then if/when a user clicks on another item which is e.g. $50, the script will add up the $30 + $50 and send it to the url or somewhere else if possible.

i am a beginner in programming so please can you help me with this as i would be very grateful, if you cant help me solve this problem then can you please tell me where i can find a free, good and easy to program paypal shopping cart?

[Patriarch]

- Nabi

If you want to go the easy route, check http://www.hotscripts.com for several free PHP/MySQL shopping cart scripts.

But that's cheating, and besides, what better way to know how your cart works than by getting your hands dirty and building it yourself?

I won't go over it all, but in regards to your question, what you can do is set up a MySQL database table with all the items and their prices.

After that, query the database, and then output it in an html form:

PHP Code:

<form action="calculate.php" method="post">

<?php

$qry_items = mysql_query('SELECT item, cost FROM tbl_items');

while ($rst_items = mysql_fetch_array($qry_items)) {

?>

<input type="checkbox" name="price" value="<?= $rst_items['cost']; ?>" /> - <?= $rst_items['item']; ?><br />

<?php

}

?>

</form>

After the user submits the form, all you need to do is loop through the "price" formfield, adding each item to a variable which holds the sum.

Hope that helps, and good luck.

- Patriarch