php下载文件代码

        $file=fopen(‘文件地址‘,"r");
        header("Content-Type: application/octet-stream");
        header("Accept-Ranges: bytes");
        header("Accept-Length: ".filesize(‘文件地址‘));
        header("Content-Disposition: attachment; filename=文件名称");
        echo fread($file,filesize(‘文件地址‘));
        fclose($file);