magentoAPI new MagentoApi from strtotime now -3 day to strtotime now f

  $magentoAPI = new MagentoApi();
        $from = strtotime("now -3 day");
        //$to = strtotime("now");

        $filters = array('complex_filter' =>
            array(
                array('key' => 'updated_at', 'value' => array('key' => 'from', 'value' => date('Y-m-d H:i:s', $from))),
                array('key' => 'status', 'value' => array('key' => 'equal', 'value' => 'complete'))
            )
        );