Wordpress order posts by post type

Question

I am trying to create a system which fetches post from 2 post types and i want to display the posts order by their post type. I am trying to first show the posts from one po

Answer 1

Order per post types with custom post type order:

add_filter('pre_get_posts', function ($query) {

    if ($query->is_search && !is_admin()) :
        $query->set('post_type', [ 'cpt-1', 'cpt-2', 'post', 'cpt-3']);
    endif;

    return $query;
});



add_filter('posts_orderby', function ( $order ) {

    if ( ! is_admin() ) :

        if ( is_search() && is_main_query() ) :

            global $wpdb;
            $order = "FIELD( post_type, 'cpt-1', 'cpt-2', 'post' ), {$wpdb->posts}.post_modified DESC";      
        endif;

    // Disable this filter for future queries!
    remove_filter( current_filter(), __FUNCTION__);
    endif;

    return $order;
});