Price calculator form

What would be the correct way to create a site that incorporated a form as in the attachment that allows a customer to click on a few options in dropdown lists and checkboxes to give a final cost?

you would need to hand code the calculation

<?php

if($_SERVER['REQUEST_METHOD'] == "POST") {

    $var1 = (isset($_POST['element1']))?intval($_POST['element1']):0;

    $var2 = (isset($_POST['element2']))?intval($_POST['element2']):0;

    $theSum = ($var1 + $var2);

    echo $theSum;

}

?>

1. Ah, so am I correct in assuming this would not need a simple database and a backend to input values for the calculation to work. Its all done in the form.

2. Can you point me to some extra info on this so I can understand how its done.

no, no database is needed.

the calculation is done using basic math in php.


look at my example.

In my example, i am using 2 form elements. element1 and element2:

<input type="text" name="element1" id="element1" />

<input type="text" name="element2" id="element2" />

this line casts the value of element1 to a variable named var1 (it assigns 0 if the value is blank):
$var1 = (isset($_POST['element1']))?intval($_POST['element1']):0;

this line casts the value of element2 to a variable named var2 (it assigns 0 if the value is blank):
$var2 = (isset($_POST['element2']))?intval($_POST['element2']):0;


this line adds the 2 together using simple addition:
$theSum = ($var1 + $var2);


see this page for basics on PHP math:
php_operators.asp

Thankyou, clear and simple explanations, as always.