What potential impact could a newsletter form, with similar variable names, have on the functionality of the order form script?

Having similar variable names in the newsletter form and order form script could potentially cause conflicts or errors in the functionality of the script. To solve this issue, you should ensure that each form has unique variable names to prevent any overlap or confusion in the script.

// Newsletter form variables
$newsletter_email = $_POST['newsletter_email'];
$newsletter_name = $_POST['newsletter_name'];

// Order form variables
$order_email = $_POST['order_email'];
$order_name = $_POST['order_name'];
$order_quantity = $_POST['order_quantity'];
$order_total = $_POST['order_total'];