Question

I have this code in my HTML form:

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

<input type="hidden" value="1" name="sample_" id="sample_">
Sample Bottle  <br /><input type="submit" value="Add to Cart" name="sample"><br />

</form>


<h1>Cart Total: $<?php echo $cart; ?></h1>

And then in the referenced cart.php file I have:

        $cart = 0;
    $samples = ($_POST['sample_']) * 50;
    $cart = $cart + $samples;

    echo $cart;'

Unfortunately, this code isn’t doing what I want it to and I need some help.
Ideally, I simply want the code to add “50” to the Cart, which starts at 0, when the Add to Cart button is pressed.

Example: http://www.craighooghiem.com/linpap/order

Can someone tell me how I can do this in a much simpler way?
Apparently I can use <?=$_SERVER['PHP_SELF'];?> somehow to perform this function without leaving the file, but everytime I attempt to do that it takes be back to the website’s homepage.

I am using a WordPress template file for the PHP if that makes a difference.

EDIT: I have quickly learned that I am not all that familiar with PHP at all, I barely know the ropes at this point.

Answer 1

To remain on the same page, leave the action attribute of the form empty eg:

<form method="post" action="">

Now, on submit, it won’t go to the site’s homepage.

Finally, modify your code like this:

$samples = intval($_POST['sample_']) * 50;
$cart = intval($cart) + $samples;
echo $cart;