add_action( 'woocommerce_order_status_processing', 'custom_autocomplete_order' );
function custom_autocomplete_order( $order_id ) {
if ( ! $order_id ) {
return;
}
$order = wc_get_order( $order_id );
// get status
$status = $order->get_status();
if( $status == 'processing')
$order->update_status( 'completed' );
}
