Question

I am creating an online order form for multiple products. I need to calculate the total cost for the products selected via checkbox and send it as a confirmation e-mail. The value of the checkbox is the price in dollars.

<input type="checkbox" id="product1" name="product1" value="100" />
<input type="checkbox" id="product2" name="product2" value="250" />

In my ‘process.php’ file, I need to total the cost for all items if they are checked.

if(isset($_POST['product1']) && $_POST['product1'] == '100') {
    $product1 = 100;
}

if(isset($_POST['product2']) && $_POST['product2'] == '250') {
    $product2 = 250;
}

$dollars = $product1 + $product2;

When I try to do it this way, $dollars is an empty variable “”. Can someone tell me how to fix this?

Thank you!

Answer 1

There is no syntactical error in your code. So the only explanation is that,

1. $_POST[‘product1’] does not have value 100 or they are not sent through post at all
2. $_POST[‘product2’] also does not have value 250 or they are not sent through post as well

In order to verify this, do a quick var_dump($_POST) at the top of your .php file