PHP echo in a redirect tag

Hey there,
so basically, I want users who go to /test.php?abc=http://www.google.com
to be redirected to http://www.google.com.
I tried it with the following code placed on test.php:

I tried it with a javascript redirect, along with a php header redirect, none of which worked. I also tried messing around with the echo tag, but didn't get that to work either. I don't see what I'm doing wrong, as I used to be able to get it to work.

Thanks in advance for any help!

-William

 

Variable names cannot start with numbers. Rename it to something similar to:

$_456 = $_POST['123'];

PHP:

 

Oh, and to get variables from the URL, you have to use $_GET instead of $_POST.

 

Silly me, but I just happened to write the numbers here on the forum, In my actual script, they're letters.

Thanks anyway.

 

Oh yeah
Thanks a million, you're a god! +rep!