Dynamically Enable/Disable Search Engines when using MigrateDB Pro

functions.php

/*
 * Migrating your DB with Migrate DB Pro
 * your "Disable Search Engines" setting
 * can get pushed to your live site
 * This is how you can automate that
 * Ref: https://deliciousbrains.com/tweaking-wp-migrate-db-pro-actions-filters/
 * AWP Link: https://www.facebook.com/groups/advancedwp/permalink/951660888229459/
 * Care of Chris Perryman www.revelationconcept.com
 */

add_filter('wpmdb_preserved_options', function($preserved_options) {
    $preserved_options = array_merge($preserved_options, array('blog_public')); // don't tell Google it can index test site!

    return array_unique($preserved_options);
});