Use the constant BLOG_ID_CURRENT_SITE
. And to get the database table prefix, use;
$main_blog_prefix = $wpdb->get_blog_prefix(BLOG_ID_CURRENT_SITE);
Use the constant BLOG_ID_CURRENT_SITE
. And to get the database table prefix, use;
$main_blog_prefix = $wpdb->get_blog_prefix(BLOG_ID_CURRENT_SITE);