PHP Redirect with Variables

[diggfann2]

I have written up a script that uses html input value's that a user may insert. At the top of my page I currently have a redirect script, however I am not positive it is constructed correctly. My code:

    <?php


if(isset($_POST['submit'])){

header('redirect: '.$_POST['num'].$_POST['amo']');

?>

If the submit button has been submitted, it is to redirect to the num value, or http:// address with the fixed 'amo' value at the end.

[slick101]

 header("Location: $url");