表格验证丢失变量

Question

Let's say I enter a registration form with this ending URL: registration.php?accountType=a The form is parsed on the same page (registration.php). If the user doesn't pass form validation they are taken to registration.php with error messages. So you see I lost my variable accountType=a. My question:

Can I submit a form for validation and retain the accountType variable? I'm aware that this could easily be done using a cookie. I just want a further understanding.

Solution: Although all of the answers below were valid, I went with a Session variable and <form action="registration.php?<?php print 'accountType=' . $_SESSION['accountType']; ?>" etc. Thanks for the help.

Answer 1

You should use this in your form:

<form action="registration.php?accountType=a">

You should use this in your php:

if ($validation_success) {
    header('sucess.php')
} else {
    // don't do anything. The page(registration.php?accountType=a) loads
}

I'm just giving you the idea.