Correct Wordpress Title Case Function

Currently working on a Wordpress site and the client has supplied content with the post titles all in UPPERCASE

Simple way to correct this:

add to your functions.php file in your chosen them:

function proper_title($data)  {
$data['post_title'] = ucwords(strtolower($data['post_title']));
return $data;
}
add_filter('wp_insert_post_data', 'proper_title');

Now you can paste the title all in UPPERCASE and Wordpress will correct it as you publish the page, by converting to lowercase then applying Ucwords (TitleCase)

Big time saver for me, hope it helps someone else.