图片下载 及 打包下载

//单张图片下载  
$code_info = PartnerQrCode::with('partnerLocomotive')->where('qr_unique_code',$_GET['filename'])->first()->toArray();
        $name = $code_info['partner_locomotive']['locomotive_code'].'_'.$code_info['carriage'].'_'.$code_info['seat_row'].'_'.$code_info['seat_no'];
        $filename =  storage_path('image/'.$_GET['filename'].'create.png');;
        //设置头信息
        header('Content-Disposition:attachment;filename=' . $name);
        header('Content-Length:' . filesize($filename));
        //读取文件并写入到输出缓冲
        readfile($filename);

//多张图片下载打包
  set_time_limit(0);
        @$dfile = tempnam('/tmp', 'tmp');//产生一个临时文件，用于缓存下载文件
        $zip = new ImagesDown();
        $filename = 'code_images.zip'; //下载的默认文件名
        $listData = PartnerQrCode::qrcodeListZip($request);
        foreach ($listData as $key=>$v) {
            if($v['qr_code_image_url']){
                if(!empty($v)){
                    $image_name =$v['partner_locomotive']['locomotive_code'].'_'.$v['carriage'].'_'.$v['seat_row'].'_'.$v['seat_no'];
                    $save_name = $image_name.'.png';
                    $save_name = str_replace('/','|',$save_name);
//                    echo $save_name;exit;

                    $save_name = iconv('utf-8', 'gbk//ignore', $save_name);
                    try{
                        $zip->add_file(file_get_contents('http://'.$_SERVER["HTTP_HOST"].$v['qr_code_image_url']),$save_name);

                    }catch (\Exception $e){

                    }
                }
            }
        }
//----------------------
        $zip->output($dfile);
// 下载文件
        ob_clean();
        header('Pragma: public');
        header('Last-Modified:' . gmdate('D, d M Y H:i:s') . 'GMT');
        header('Cache-Control:no-store, no-cache, must-revalidate');
        header('Cache-Control:pre-check=0, post-check=0, max-age=0');
        header('Content-Transfer-Encoding:binary');
        header('Content-Encoding:none');
        header('Content-type:multipart/form-data');
        header('Content-Disposition:attachment; filename="' . $filename . '"'); //设置下载的默认文件名
        header('Content-length:' . filesize($dfile));
        $fp = fopen($dfile, 'r');
        while (connection_status() == 0 && $buf = @fread($fp, 8192)) {
            echo $buf;
        }
        fclose($fp);
        @unlink($dfile);
        @flush();
        @ob_flush();
        exit();

> 1);
    }

    public function add_file($data, $name, $time = 0)
    {
        $name = str_replace('\\', '/', $name);
        $dtime = dechex($this->unix2_dostime($time));
        $hexdtime = '\x' . $dtime [6] . $dtime [7] . '\x' . $dtime [4] . $dtime [5] . '\x' . $dtime [2] . $dtime [3] . '\x' . $dtime [0] . $dtime [1];
        eval('$hexdtime = "' . $hexdtime . '";');
        $fr = "\x50\x4b\x03\x04";
        $fr .= "\x14\x00";
        $fr .= "\x00\x00";
        $fr .= "\x08\x00";
        $fr .= $hexdtime;
        $unc_len = strlen($data);
        $crc = crc32($data);
        $zdata = gzcompress($data);
        $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
        $c_len = strlen($zdata);
        $fr .= pack('V', $crc);
        $fr .= pack('V', $c_len);
        $fr .= pack('V', $unc_len);
        $fr .= pack('v', strlen($name));
        $fr .= pack('v', 0);
        $fr .= $name;
        $fr .= $zdata;
        $fr .= pack('V', $crc);
        $fr .= pack('V', $c_len);
        $fr .= pack('V', $unc_len);
        $this->datasec [] = $fr;
        $cdrec = "\x50\x4b\x01\x02";
        $cdrec .= "\x00\x00";
        $cdrec .= "\x14\x00";
        $cdrec .= "\x00\x00";
        $cdrec .= "\x08\x00";
        $cdrec .= $hexdtime;
        $cdrec .= pack('V', $crc);
        $cdrec .= pack('V', $c_len);
        $cdrec .= pack('V', $unc_len);
        $cdrec .= pack('v', strlen($name));
        $cdrec .= pack('v', 0);
        $cdrec .= pack('v', 0);
        $cdrec .= pack('v', 0);
        $cdrec .= pack('v', 0);
        $cdrec .= pack('V', 32);
        $cdrec .= pack('V', $this->old_offset);
        $this->old_offset += strlen($fr);
        $cdrec .= $name;
        $this->ctrl_dir[] = $cdrec;
    }

    public function add_path($path, $l = 0)
    {
        $d = @opendir($path);
        $l = $l > 0 ? $l : strlen($path) + 1;
        while ($v = @readdir($d)) {
            if ($v == '.' || $v == '..') {
                continue;
            }
            $v = $path . '/' . $v;
            if (is_dir($v)) {
                $this->add_path($v, $l);
            } else {
                $this->add_file(file_get_contents($v), substr($v, $l));
            }
        }
    }

    public function file()
    {
        $data = implode('', $this->datasec);
        $ctrldir = implode('', $this->ctrl_dir);
        return $data . $ctrldir . $this->eof_ctrl_dir . pack('v', sizeof($this->ctrl_dir)) . pack('v', sizeof($this->ctrl_dir)) . pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
    }

    public function add_files($files)
    {
        foreach ($files as $file) {
            if (is_file($file)) {
                $data = implode("", file($file));
                $this->add_file($data, $file);
            }
        }
    }

    public function output($file)
    {
        $fp = fopen($file, "w");
        fwrite($fp, $this->file());
        fclose($fp);
    }
}

//前端 
location.href='';//即可