一个PHP的ZIP压缩类分享_php实例-tutorial php-php.cn

功能：将文件压缩成zip，或者rar的压缩包。后缀名可以自定义。

使用方法：首先实例化，然后传参。两个参数。第一个关于你文件地址的一个Array。第二个是要你要保存的压缩包文件的绝对地址。

使用例子：

复制代码代码如下:

        $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); //添加文件列表

PHP的ZIP压缩类如下：

复制代码代码如下:

#
# PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18
#    (Changed: 2003-03-01)
#
# Makes zip archive
#
# Based on "Zip file creation class", uses zLib
#
#
class PHPZip
{
    function Zip($dir, $zipfilename)
    {
       if (@function_exists('gzcompress'))
       {
           $curdir = getcwd();
           if (is_array($dir))
           {
                   $filelist = $dir;
           }
           else
           {
               $filelist = $this -> GetFileList($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 = "\x50\x4b\x05\x06\x00\x00\x00\x00";
    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']            $timearray['year']    = 1980;
           $timearray['mon']     = 1;
           $timearray['mday']    = 1;
           $timearray['hours']   = 0;
           $timearray['minutes'] = 0;
           $timearray['seconds'] = 0;
        } // end if

        return (($timearray['year'] - 1980)                 ($timearray['hours'] > 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]
                   Western union point . '\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";            // ver needed to extract
        $fr   .= "\x00\x00";            // gen purpose bit flag
        $fr   .= "\x08\x00";            // 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 = "\x50\x4b\x01\x02";
        $cdrec .= "\x00\x00";                // version made by
        $cdrec .= "\x14\x00";                // version needed to extract
        $cdrec .= "\x00\x00";                // gen purpose bit flag
        $cdrec .= "\x08\x00";                // 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
            "\x00\x00";                             // .zip file comment length
    } // end of the 'file()' method

} // end of the 'PHPZip' class
?>