Heim > Backend-Entwicklung > PHP-Tutorial > 一个PHP的ZIP压缩类分享_PHP

一个PHP的ZIP压缩类分享_PHP

WBOY
Freigeben: 2016-06-01 11:53:14
Original
786 Leute haben es durchsucht

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
?>

Verwandte Etiketten:
php
Quelle:php.cn
Erklärung dieser Website
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Beliebte Tutorials
Mehr>
Neueste Downloads
Mehr>
Web-Effekte
Quellcode der Website
Website-Materialien
Frontend-Vorlage