<?php

    $namePath = '/reportxlsx/' . $this->params . '.xlsx';

    $name = $this->params . '.xlsx';

    header('Content-Description: File Transfer');
    header('Content-Type:  application/octet-stream');
    header('Content-Disposition: attachment; filename=' . $name );
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($name));
    readfile($namePath);
    exit;