lw_test/app/mobile/controller/Download.php

<?php

namespace app\mobile\controller;

use app\mobile\MobileBaseController;

class Download extends MobileBaseController
{
    public function index()
    {
        return view();
    }

    public function down()
    {
        $file_url  = input('file_url', '');
        $file_path = public_path('static/mobile/download') . $file_url;
        if (!file_exists($file_path)) {
            jump('文件不存在或已过期！');
        }
        $file_name = ['1.pdf' => '晋江市党建引领基层网格管理工作文件汇编.pdf', '2.doc' => '社会保险知识问答.doc', '3.docx' => '泉州市城乡居民基本医保待遇政策.docx', '4.doc' => '晋江市基层计生协会业务工作培训材料.doc'];
        return download($file_path, $file_name[$file_url]);
    }
}