WORDPRESS: Custom Post Type Front Page

WORDPRESS: Custom Post Type Front Page

/**
 * Adds CPTs to the list of available pages for a static front page.
 *
 * @param  string $select Existing select list.
 * @return string
 */
function add_cpt_to_front_page_dropdown( $select )
{
    if ( FALSE === strpos( $select, '<select name="page_on_front"' ) )
    {
        return $select;
    }

    $cpt_posts = get_posts(
        array(
            'post_type'      => 'YOUR_POST_TYPE'
        ,   'nopaging'       => TRUE
        ,   'numberposts'    => -1
        ,   'order'          => 'ASC'
        ,   'orderby'        => 'title'
        ,   'posts_per_page' => -1
        )
    );

    if ( ! $cpt_posts ) // no posts found.
    {
        return $select;
    }

    $current = get_option( 'page_on_front', 0 );

    $options = walk_page_dropdown_tree(
        $cpt_posts
    ,   0
    ,    array(
            'depth'                 => 0
         ,  'child_of'              => 0
         ,  'selected'              => $current
         ,  'echo'                  => 0
         ,  'name'                  => 'page_on_front'
         ,  'id'                    => ''
         ,  'show_option_none'      => ''
         ,  'show_option_no_change' => ''
         ,  'option_none_value'     => ''
        )
    );

    return str_replace( '</select>', $options . '</select>', $select );
}