How to copy a part of the link into php script

Hy guys, I need your help

I managed to get the youtube link of the youtube videos that are posted on my website, now i need to get it to a website where the user can convert it
so, this is how the link is:

http://www.tralala.boom/test.php?url=http://www.youtube.com/watch?v=b57AHID-_3k&hq=1

Code (markup):

i want to create a link in test.php that contains a part of the url
something like this:

http://www.conversionewebsite.org/?url=http://www.youtube.com/watch?v=b57AHID-_3k&hq=1

Code (markup):

Thanks in advance

 

In test.php:

<?php
$ytURL = $_GET['url'];
$conversionURL = "http://www.conversionewebsite.org/?url=$ytURL";

// choose only one of these:
header("Location: $conversionURL"); // if you want to redirect the user to the conversion website
echo $conversionURL; // if you only want to print the conversion website's URL

exit();

?>

PHP:

It should work.

 

Thanks allot modz, you really made my day!