I need to permanently redirect a page to a new url, and instead of doing it in the .htaccess file I thought it might be better to do it in php. I'm not sure if I did it right though?

<?php
Header( "HTTP/1.1 301 Moved Permanently" );
header( 'Location: http://www.website.com/newurl' ) ;
?>

The code looks fine to me.

You're first call to header starts with an upper case letter. This technically isn't an issue but by convention you should match the case of the function definition.

Edit
If there is code after your the lines you posted you may want to call exit to halt the script.

Thanks!