PHP 301 redirects for Apache and IIS

This one is just here for my own reference, because the default 302 status code just isn't good enough!

PHP 301 for Apache:

header("HTTP/1.1 301 Moved Permanently");
header("Location: http://www.example.com/newpage/");
exit;

PHP 301 for IIS:

header("Status: 301 Moved Permanently");
header("Location: http://www.example.com/newpage/");
exit;