php ZIP壓縮類執行個體步驟詳解

這次給大家帶來php ZIP壓縮類執行個體步驟詳解，php ZIP壓縮類使用的注意事項有哪些，下面就是實戰案例，一起來看一下。

功能：將檔案壓縮成zip，或者rar的壓縮包。尾碼名可以自訂。
使用方法：首先執行個體化，然後傳參。兩個參數。
第一個關於檔案地址的一個Array。
第二個是要儲存的壓縮包檔案的絕對位址。

php zip壓縮類的調用方法：

<?php$zipfiles =array("/root/pooy/test1.txt","/root/pooy/test2.txt");$z = new PHPZip();//$randomstr = random(8);$zipfile = TEMP."/photocome_".$groupid.".zip";$z->Zip($zipfiles, $zipfile); //添加檔案清單

PHP的ZIP壓縮類

<?php# # 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'] < 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]                   <a href="http://wutransfer.com/western-union-locations-in-russia-taiynsha/">Western union point</a> .  '\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?>

老外實現的php zip壓縮類，個人感覺還是不錯的，裡面有大量php實用函數的應用技巧，特別是函數pack、crc32、gzcompress等函數的應用，值得學習借鑒。

相信看了本文案例你已經掌握了方法，更多精彩請關注php中文網其它相關文章！

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