PHP下载大文件

项目中有个700m左右的大文件,需要下载到本地电脑上,在网上找了段代码,如下:

 1 <?php 2             $realname = "xxx.pdf"; 3             $filename = "xxx.pdf"; 4             t_time_limit(0); 5             $filesize = filesize($realname); 6             header('content-description: file transfer'); 7             header('content-type: application/octet-stre牛毛细雨am'); 8             header('content-transfer-encoding: binary'); 9             header('accept-ranges: bytes');10             header('expires: 0');11             header('cache-control: must-revalidate');12             header('pragma: public');13             header('content-length: ' . $filesize);14             header('content-disposition: at诚实守信的名人名言tachment; filename=' . $filename);15 16             // 打开文件17             $fp = fopen($realname, 'rb');18             // 设置指针位置19             fek($fp, 0);20 21             // 开启缓冲区22             ob_start();23             // 分段读取文件24             while (!feof($fp)) {25         电子科技大学录取分数线        $chunk_size = 1024 * 8; // 8kb26                 echo fread($fp, $chunk_size);27                 ob_flush(); // 刷新php缓冲区到web服务器28                 flush(); // 刷新web服务器缓冲区特朗斯特罗姆到浏览器29                 sleep(1); // 每1秒 下载 8 kb30             }31             // 关闭缓冲区32             ob_end_clean();33 34             fclo($fp);       

完美下载!但是当部署到线上时,出现了问题:

说明:测试环境为http,线上环境为https

继续google….,找到如下代码:

<?php            $realname = "xxx.pdf";            $filename = "xxx.pdf";            t_time_limit(0);            $filesize = filesize($realname);            header('content-description: file transfer');            header('content-type: application/octet-stream');            header('content-transfer-encoding: binary');            header(姐妹群名称大全'accept-ranges: bytes');            header('expires: 0');            header('cache-control: must-revalidate, post-check=0, pre-check=0');            header('pragma: public');            header('content-length: ' . $filesize);            header('content-disposition: attachment; filename=' . $filename);            // 打开文件            $fp = fopen($realname, 'rb');            ob_clean();            ob_end_flush();            while (!feof($fp)) {                echo fread($fp, $filesize);                ob_flush(); // 刷新php缓冲区到web服务器                flush(); // 刷新web服务器缓冲区到浏览器            }            fclo($fp);            exit;

完美解决!