一个完美的PHP ZIP压缩类代码

本程序可以快速的实现把我们的文件利用php压缩类压缩成我们想的zip，或者rar 的压缩包,后缀名可以自定义哦, 压缩算法是来自国外一个网站抄的。

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。

For example：

代码如下	复制代码
$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：

代码如下

复制代码

# # 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 = "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']             $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]                   . '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 ?>