Multiple redirects based on keyword

I have three links on my page that look like this

http://www.mydomain.com/page2.php?keyword=green
http://www.mydomain.com/page2.php?keyword=red
http://www.mydomain.com/page2.php?keyword=blue

all page2.php is is a redirect page. how can i define what url page2.php redirects to based on the keyword variable in the url?


thx

 

$locations = array(
    // Keyword => URL
    'green'  => 'http://example.com',
    'red'    => 'http://example.com',
    'blue'   => 'http://example.com'
);

if (isset($locations[$_GET['keyword']]))
{
    header('Location: '. $locations[$_GET['keyword']]);
}
else
{
    header('Location: http://example.com/default.html');
}

exit();

PHP:

 

Perfect - thanks.