1 <?php
  2 
  3 
  4 class Imagedown {
  5     var $datasec      = array ();
  6     var $ctrl_dir     = array ();
  7     var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
  8     var $old_offset   = 0;
  9     public function unix2_dostime($unixtime = 0){
 10         $timearray = ($unixtime == 0) ? getdate () : getdate($unixtime);
 11         if ($timearray ['year'] < 1980){
 12             $timearray ['year'] = 1980;
 13             $timearray ['mon'] = 1;
 14             $timearray ['mday'] = 1;
 15             $timearray ['hours'] = 0;
 16             $timearray ['minutes'] = 0;
 17             $timearray ['seconds'] = 0;
 18         }
 19         return (($timearray ['year'] - 1980) << 25) | ($timearray ['mon'] << 21) | ($timearray ['mday'] << 16) | ($timearray ['hours'] << 11) | ($timearray ['minutes'] << 5) | ($timearray ['seconds'] >> 1);
 20     }
 21     public function add_file($data, $name, $time = 0){
 22         $name = str_replace('\\', '/', $name);
 23         $dtime = dechex($this->unix2_dostime($time));
 24         $hexdtime = '\x' . $dtime [6] . $dtime [7] . '\x' . $dtime [4] . $dtime [5] . '\x' . $dtime [2] . $dtime [3] . '\x' . $dtime [0] . $dtime [1];
 25         eval('$hexdtime = "' . $hexdtime . '";');
 26         $fr = "\x50\x4b\x03\x04";
 27         $fr .= "\x14\x00";
 28         $fr .= "\x00\x00";
 29         $fr .= "\x08\x00";
 30         $fr .= $hexdtime;
 31         $unc_len = strlen($data);
 32         $crc = crc32($data);
 33         $zdata = gzcompress($data);
 34         $zdata = substr(substr($zdata, 0, strlen($zdata)- 4), 2);
 35         $c_len = strlen($zdata);
 36         $fr .= pack('V', $crc);
 37         $fr .= pack('V', $c_len);
 38         $fr .= pack('V', $unc_len);
 39         $fr .= pack('v', strlen($name));
 40         $fr .= pack('v', 0);
 41         $fr .= $name;
 42         $fr .= $zdata;
 43         $fr .= pack('V', $crc);
 44         $fr .= pack('V', $c_len);
 45         $fr .= pack('V', $unc_len);
 46         $this->datasec [] = $fr;
 47         $cdrec = "\x50\x4b\x01\x02";
 48         $cdrec .= "\x00\x00";
 49         $cdrec .= "\x14\x00";
 50         $cdrec .= "\x00\x00";
 51         $cdrec .= "\x08\x00";
 52         $cdrec .= $hexdtime;
 53         $cdrec .= pack('V', $crc);
 54         $cdrec .= pack('V', $c_len);
 55         $cdrec .= pack('V', $unc_len);
 56         $cdrec .= pack('v', strlen($name));
 57         $cdrec .= pack('v', 0);
 58         $cdrec .= pack('v', 0);
 59         $cdrec .= pack('v', 0);
 60         $cdrec .= pack('v', 0);
 61         $cdrec .= pack('V', 32);
 62         $cdrec .= pack('V', $this->old_offset);
 63         $this->old_offset += strlen($fr);
 64         $cdrec .= $name;
 65         $this->ctrl_dir[] = $cdrec;
 66     }
 67     public function add_path($path, $l = 0){
 68         $d = @opendir($path);
 69         $l = $l > 0 ? $l : strlen($path) + 1;
 70         while($v = @readdir($d)){
 71             if($v == '.' || $v == '..'){
 72                 continue;
 73             }
 74             $v = $path . '/' . $v;
 75             if(is_dir($v)){
 76                 $this->add_path($v, $l);
 77             } else {
 78                 $this->add_file(file_get_contents($v), substr($v, $l));
 79             }
 80         }
 81     }
 82     public function file(){
 83         $data = implode('', $this->datasec);
 84         $ctrldir = implode('', $this->ctrl_dir);
 85         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($data)) . "\x00\x00";
 86     }
 87     public function add_files($files){
 88         foreach($files as $file){
 89             if (is_file($file)){
 90                 $data = implode("", file($file));
 91                 $this->add_file($data, $file);
 92             }
 93         }
 94     }
 95     public function output($file){
 96         $fp = fopen($file, "w");
 97         fwrite($fp, $this->file ());
 98         fclose($fp);
 99     }
100 }

View Code

 

以上是类文件  文件外进行调用

 

 1   public function dowmload_img()
 2     {
 3          $img_id=   $_GET["url"];
 4          print_r($img_id);exit();
 5         //打包下载实例操作过程
 6         $dfile = tempnam('/tmp', 'tmp');//产生一个临时文件，用于缓存下载文件
 7         require_once ROOT_PATH.'extend/PHPImagedown/Imagedown.php';
 8         $zip = new \Imagedown();
 9         //能访问到的路径
10         $image = array(
11             'http://a.cn/upimages/20191128/2019112815749059887920.jpg',
12             'http://a.cn/upimages/20191128/2019112815749059887920.jpg'
13         );
14 
15         $filename = 'image.zip'; //下载的默认文件名
16         foreach($image as $v){
17             $zip->add_file(file_get_contents($v), basename($v));
18             // 添加打包的图片，第一个参数是图片内容，第二个参数是压缩包里面的显示的名称, 可包含路径
19             // 或是想打包整个目录 用 $zip->add_path($image_path);
20         }
21 //----------------------
22         $zip->output($dfile);
23 // 下载文件
24         ob_clean();
25         header('Pragma: public');
26         header('Last-Modified:'.gmdate('D, d M Y H:i:s') . 'GMT');
27         header('Cache-Control:no-store, no-cache, must-revalidate');
28         header('Cache-Control:pre-check=0, post-check=0, max-age=0');
29         header('Content-Transfer-Encoding:binary');
30         header('Content-Encoding:none');
31         header('Content-type:multipart/form-data');
32         header('Content-Disposition:attachment; filename="'.$filename.'"'); //设置下载的默认文件名
33         header('Content-length:'. filesize($dfile));
34         $fp = fopen($dfile, 'r');
35         while(connection_status() == 0 && $buf = @fread($fp, 8192)){
36             echo $buf;
37         }
38         fclose($fp);
39         @unlink($dfile);
40         @flush();
41         @ob_flush();
42         exit();
43     }

图片打包下载