Simple PHP Out Redirect

Hello,

I am setting up a search engine and on the results page i have likes like this http://example.com/out.php?u={} how can i make it so http://ex.../ redirects to http://youtube.com/ Thanks,

 

<?php
    header('Location: ' . $_GET['u']);
?>

PHP:

 

what about if they goto the out.php file its a blank page how can i make it redirect to http://example.com/

thanks,

 

So... if they go to: http://example.com/out.php it will redirect them to http://example.com/
If they go to: http://example.com/out.php?u=http://www.google.com/ it will redirect them to google.

<?php
    if (!isset($_GET['u'])) $_GET['u'] = 'http://example.com/';
    header('Location: ' . $_GET['u']);
?>

PHP:

 

You might also want to validate $_GET['u'] (check if its actually an url etc.)

 

Actually that's simple:

<?php
    if (!isset($_GET['u']) ||
        !filter_var($_GET['u'], FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED)) $_GET['u'] = 'http://example.com/';
    header('Location: ' . $_GET['u']);
?>

PHP: