Set post title to same value as a tow meta box

Question

I've removed "Title" from a custom post type that I created. Which makes it that all new posts gets the name "Auto Draft".

To get around this I want to be able to fetch a value/post name from a meta box and save that as the new title. Is this possible?

Now i need to when i save new post i need to set post title like this

matches_first x matches_second

where matches_first is meta box 1 and matches_second is meta box 2

Answer 1

Why do you need to remove the title? Generally it's a bad idea, as the title generates the permalink, can't think of any scenario where it would be necessary.

Anyways, here is some code that looks like it does what you need:

function add_custom_title( $data, $postarr ) {
    if($data['post_type'] == 'myposttype') {
        if(empty($data['post_title']) {
            // here would go the code to construct your custom title
            $data['post_title'] = 'my post title';
        }
    }
    return $data;
}

add_filters('wp_insert_post_data', 'add_custom_title', 10, 2 );

src: http://premium.wpmudev.org/forums/topic/assign-default-title-to-custom-post-types