Sync all User Roles between two Wordpress Installs

I have created a Woocommerce Store (database prefix wp_) and a Wordpress Blog (database prefix wp_new_) that share the same users (sharing the same wp_users and wp_user_meta tables).

I want to sync not just users but also user roles (multiple user roles) of all users.

For this I tried the solution offered by https://kinsta.com/blog/share-logins-wordpress/

    function ksu_save_role( $user_id, $role ) {

        $prefix_1 = 'wp_'; 
        $prefix_2 = 'wp_new_'; 

        $caps = get_user_meta( $user_id, $prefix_1 . 'capabilities', true );
        $level = get_user_meta( $user_id, $prefix_1 . 'user_level', true );

        if ( $caps ){
            update_user_meta( $user_id, $prefix_2 . 'capabilities', $caps );
        }

        if ( $level ){
            update_user_meta( $user_id, $prefix_2 . 'user_level', $level );
        }
    }
add_action( 'set_user_role', 'ksu_save_role', 10, 2 );

The above solution works great when only a single user role is assigned to a user. But if a user is assigned multiple user roles then it doesn’t work. I mean, it doesn’t sync all user roles.

After digging through the database I understood that the solution lies in cloning the "meta_value" of "wp_capabilities" to "wp_new_capabilities" (in wp_usermeta)

Is there a way to copy entire ‘meta_value’ for a ‘user_id’ from “wp_capabilities” to “wp_new_capabilities”?

If we can copy the entire meta_value from “wp_capabilities” to “wp_new_capabilities” then all the user roles assigned to a user can be synced.

So what changes need to be done to the above mentioned code to achieve this?

Thanks!

I had issues with syncing user roles (multiple user roles per user). After burning midnight oil for more than two nights I found the silly magical solution :)

I simply changed 'set_user_role' to 'add_user_role' in "add_action( 'set_user_role', 'ksu_save_role', 10, 2 );"

The end code after the small magical tweak

function ksu_save_role( $user_id, $role ) {

    // Site 1
    // Change value if needed
    $prefix_1 = 'first_';

    // Site 2 prefix
    // Change value if needed
    $prefix_2 = 'second_';

    $caps = get_user_meta( $user_id, $prefix_1 . 'capabilities', true );
    $level = get_user_meta( $user_id, $prefix_1 . 'user_level', true );

    if ( $caps ){
        update_user_meta( $user_id, $prefix_2 . 'capabilities', $caps );
    }

    if ( $level ){
        update_user_meta( $user_id, $prefix_2 . 'user_level', $level );
    }
}

add_action( 'add_user_role', 'ksu_save_role', 10, 2 ); // THE MAGIC MODIFICATION

Code credits: https://kinsta.com/blog/share-logins-wordpress/

Add this to functions.php and you are great to go.

It is compatible with role changer plugins like "Woocommerce Subscriptions" and "YITH Automatic Role Changer for WooCommerce Premium"

You can set and change as many roles as you want.