PHP HELP | if ($_GET['url'] == "facebook.com").....

Hello,
I am making a script and I am a little bit stuck

<?php
if ($_GET['url']; == "facebook.com") {header("Location: /bblocker/browse.php?u=http://facebook.com/");};
if ($_GET['url']; == "youtube.com") {header("Location: /glype/browse.php?u=http://youtube.com/");};
else{}
?>

PHP:

I want it so if someone enters facebook.com or even any facebook url like http://apps.facebook.com/digitalpoint/ it redirects them to /bblocker/browse.php?u=(the url)

and for youtube the same exapt it redirects them to /glype/browse.php?u=(the url)

and if its not youtube or facebook it redirects them to /global/?u=(the url)

Thanks,

 

try something like:

if(strstr($_GET['url'], 'facebook.com'))

PHP:

 

it is working for https.
Thanks