RewriteRule

RewriteRule ^profil(1?)-([0-9]*)-(.*)\.html$ vis.profil.php?id=$2

RewriteRule ^profil1-([0-9]*)-(.*)\.html$ http://ditdomæne.dk/profil-$1-$2.html [R=301,L]
RewriteRule ^profil-([0-9]*)-(.*)\.html$ vis.profil.php?id=$1

<?php
    $request_uri = basename($_SERVER['REQUEST_URI']);
    if(preg_match("#vis\.profil\.php\?id=([0-9]*)#", $request_uri, $matches)){
        header("HTTP/1.1 404 Not Found");
        header("Location: http://ditdomæne.dk/profil-$matches[1].html");
        die();
    }
    
    if(isset($_GET['id'])){
        echo "Profil ID: <strong>".$_GET['id']."</strong><br /><br />";
        echo "<pre>$request_uri</pre>";
    } else {
        die("Mangler data!");
    }
?>