if ( get_settings('siteurl') != $old_siteurl || get_settings('home') != $old_home ) {
// If home changed, write rewrite rules to new location.
$wp_rewrite->flush_rules();
if ( get_settings('siteurl') != $old_siteurl || get_settings('home') != $old_home ) {
// If home changed, write rewrite rules to new location.
$wp_rewrite->flush_rules();