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PHP实现将多个文件压缩成zip格式并下载到本地的方法示例
2020-07-30 60人围观 0条评论
简介这篇文章主要介绍了PHP实现将多个文件压缩成zip格式并下载到本地的方法,涉及php针对文件与目录的读写、判断与zip压缩相关操作技巧,需要的朋友可以参考下

    本文实例讲述了PHP实现将多个文件压缩成zip格式并下载到本地的方法。分享给大家供大家参考,具体如下:

    废话不多说,直接上代码

    //这里需要注意该目录是否存在,并且有创建的权限
    $zipname = 'path/test.zip'
    //这是要打包的文件地址数组
    $files = array("mypath/test1.txt","mypath/test2.pdf");
    $zip = new ZipArchive();
    $res = $zip->open($zipname, ZipArchive::CREATE);
    if ($res === TRUE) {
     foreach ($files as $file) {
     //这里直接用原文件的名字进行打包,也可以直接命名,需要注意如果文件名字一样会导致后面文件覆盖前面的文件,所以建议重新命名
      $new_filename = substr($file, strrpos($file, '/') + 1);
      $zip->addFile($file, $new_filename);
     }
    }
    //关闭文件
    $zip->close();
    
    
    //这里是下载zip文件
    header("Content-Type: application/zip");
    header("Content-Transfer-Encoding: Binary");
    header("Content-Length: " . filesize($zipname));
    header("Content-Disposition: attachment; filename=\"" . basename($zipname) . "\"");
    readfile($zipname);
    exit;
    
    

    附:这里再为大家提供一个zip压缩类:

     GetFileList($dir);
          }
          if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
          else chdir($curdir);
          if (count($filelist)>0)
          {
            foreach($filelist as $filename)
            {
              if (is_file($filename))
              {
                $fd = fopen ($filename, "r");
                $content = fread ($fd, filesize ($filename));
                fclose ($fd);
                if (is_array($dir)) $filename = basename($filename);
                $this -> addFile($content, $filename);
              }
            }
            $out = $this -> file();
            chdir($curdir);
            $fp = fopen($zipfilename, "w");
            fwrite($fp, $out, strlen($out));
            fclose($fp);
          }
          return 1;
        } 
        else return 0;
      }
      function GetFileList($dir)
      {
        if (file_exists($dir))
        {
          $args = func_get_args();
          $pref = $args[1];
          $dh = opendir($dir);
          while($files = readdir($dh))
          {
            if (($files!=".")&&($files!="..")) 
            {
              if (is_dir($dir.$files)) 
              {
                $curdir = getcwd();
                chdir($dir.$files);
                $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
                chdir($curdir);
              }
              else $file[]=$pref.$files;
            }
          }
          closedir($dh);
        }
        return $file;
      }
      var $datasec   = array();
      var $ctrl_dir   = array();
      var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";
      var $old_offset  = 0;
      /**
       * Converts an Unix timestamp to a four byte DOS date and time format (date
       * in high two bytes, time in low two bytes allowing magnitude comparison).
       *
       * @param integer the current Unix timestamp
       *
       * @return integer the current date in a four byte DOS format
       *
       * @access private
       */
      function unix2DosTime($unixtime = 0) {
        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
        if ($timearray['year'] < 1980) {
          $timearray['year']  = 1980;
          $timearray['mon']   = 1;
          $timearray['mday']  = 1;
          $timearray['hours']  = 0;
          $timearray['minutes'] = 0;
          $timearray['seconds'] = 0;
        } // end if
        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
            ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
      } // end of the 'unix2DosTime()' method
      /**
       * Adds "file" to archive
       *
       * @param string  file contents
       * @param string  name of the file in the archive (may contains the path)
       * @param integer the current timestamp
       *
       * @access public
       */
      function addFile($data, $name, $time = 0)
      {
        $name   = str_replace('', '/', $name);
        $dtime  = dechex($this->unix2DosTime($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  = "x50x4bx03x04";
        $fr  .= "x14x00";      // ver needed to extract
        $fr  .= "x00x00";      // gen purpose bit flag
        $fr  .= "x08x00";      // compression method
        $fr  .= $hexdtime;       // last mod time and date
        // "local file header" segment
        $unc_len = strlen($data);
        $crc   = crc32($data);
        $zdata  = gzcompress($data);
        $c_len  = strlen($zdata);
        $zdata  = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
        $fr   .= pack('V', $crc);       // crc32
        $fr   .= pack('V', $c_len);      // compressed filesize
        $fr   .= pack('V', $unc_len);     // uncompressed filesize
        $fr   .= pack('v', strlen($name));  // length of filename
        $fr   .= pack('v', 0);        // extra field length
        $fr   .= $name;
        // "file data" segment
        $fr .= $zdata;
        // "data descriptor" segment (optional but necessary if archive is not
        // served as file)
        $fr .= pack('V', $crc);         // crc32
        $fr .= pack('V', $c_len);        // compressed filesize
        $fr .= pack('V', $unc_len);       // uncompressed filesize
        // add this entry to array
        $this -> datasec[] = $fr;
        $new_offset    = strlen(implode('', $this->datasec));
        // now add to central directory record
        $cdrec = "x50x4bx01x02";
        $cdrec .= "x00x00";        // version made by
        $cdrec .= "x14x00";        // version needed to extract
        $cdrec .= "x00x00";        // gen purpose bit flag
        $cdrec .= "x08x00";        // compression method
        $cdrec .= $hexdtime;         // last mod time & date
        $cdrec .= pack('V', $crc);      // crc32
        $cdrec .= pack('V', $c_len);     // compressed filesize
        $cdrec .= pack('V', $unc_len);    // uncompressed filesize
        $cdrec .= pack('v', strlen($name) ); // length of filename
        $cdrec .= pack('v', 0 );       // extra field length
        $cdrec .= pack('v', 0 );       // file comment length
        $cdrec .= pack('v', 0 );       // disk number start
        $cdrec .= pack('v', 0 );       // internal file attributes
        $cdrec .= pack('V', 32 );      // external file attributes - 'archive' bit set
        $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
        $this -> old_offset = $new_offset;
        $cdrec .= $name;
        // optional extra field, file comment goes here
        // save to central directory
        $this -> ctrl_dir[] = $cdrec;
      } // end of the 'addFile()' method
      /**
       * Dumps out file
       *
       * @return string the zipped file
       *
       * @access 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)) . // total # of entries "on this disk"
          pack('v', sizeof($this -> ctrl_dir)) . // total # of entries overall
          pack('V', strlen($ctrldir)) .      // size of central dir
          pack('V', strlen($data)) .       // offset to start of central dir
          "x00x00";               // .zip file comment length
      } // end of the 'file()' method
    } // end of the 'PHPZip' class
    ?>
    
    

    用法:

    $zipfiles =array("/root/pooy/test1.txt","/root/pooy/test2.txt");
    $z = new PHPZip();
    //$randomstr = random(8);
    $zipfile = TEMP."/photocome_".$groupid.".zip";
    $z->Zip($zipfiles, $zipfile);
    
    

    更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP操作zip文件及压缩技巧总结》、《php文件操作总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总

    希望本文所述对大家PHP程序设计有所帮助。

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