Question

First off, thanks for reading my question!
Secondly, I am looking at developing the most simple of simple Cart applications.. or functions.

It will only be used on a single page for 3 static products.

All I want:

A PHP function, attached to a button, that will allow me to add a variable (cost of item) to another variable (Total Cart) that will be displayed in a separate DIV as the Total Cost.

Thanks,

Craig

Answer 1

Ajax could be used, I would recommend reading up on working with Ajax and PHP and visit some tutorials to gain some experience first.

Then when you have trouble with working with Ajax and PHP, come back to ask a question and see if we can troubleshoot from there.

• Ajax PHP Tutorial
• PHP Example AJAX and MySQL
• AJAX and PHP: Building Responsive Web Applications

EDIT:

You could use Ajax for the showing/hiding the div, but thats about it. If you just need to create a non-trivial function and add up some values, you don’t need AJAX, PHP can do that.

<?php
if (isset($_POST['submit'])) {
 // only perform function if it was posted.
 $listOfItems = $_POST['items']; // an array of selection.
 $totalprice = 0;
 foreach ($listOfItems as $list) {
     $totalprice = $totalprice + $list; // calculate total price.
  }
 // perform more code here
}

<form action="<?=$_SERVER['PHP_SELF'];?>" method="post">
Your first item here  <input type="checkbox" value="item1" name="items[]"><br />
Your second item here <input type="checkbox" value="item2" name="items[]"><br />
Your third item here  <input type="checkbox" value="item3" name="items[]"><br />
</form>
?>