<?php
if (!defined('ROOT')) exit('Can\'t Access !');

class PHPZip
{
    private $ctrl_dir=array();
    private $datasec=array();


    /**********************************************************
     * 压缩部分
     **********************************************************/
    // ------------------------------------------------------ //
    // #遍历指定文件夹
    //
    // $archive  = new PHPZip();
    // $filelist = $archive->visitFile(文件夹路径);
    // print "当前文件夹的文件:<p>\r\n";
    // foreach($filelist as $file)
    //     printf("%s<br>\r\n", $file);
    // ------------------------------------------------------ //
    var $fileList=array();

    public function visitFile($path) {
        global $fileList;
        $path=str_replace("\\", "/", $path);
        $fdir=dir($path);

        while(($file=$fdir->read()) !== false) {
            if($file == '.' || $file == '..') {
                continue;
            }

            $pathSub=preg_replace("*/{2,}*", "/", $path."/".$file);  // 替换多个反斜杠
            $fileList[]=is_dir($pathSub) ? $pathSub."/" : $pathSub;
            if(is_dir($pathSub)) {
                $this->visitFile($pathSub);
            }
        }
        $fdir->close();
        return $fileList;
    }


    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;
        }

        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
    }


    var $old_offset=0;

    private function addFile($data, $filename, $time=0) {
        $filename=str_replace('\\', '/', $filename);

        $dtime=dechex($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="\x50\x4b\x03\x04";
        $fr.="\x14\x00";
        $fr.="\x00\x00";
        $fr.="\x08\x00";
        $fr.=$hexdtime;
        $unc_len=strlen($data);
        $crc=crc32($data);
        $zdata=gzcompress($data);
        $c_len=strlen($zdata);
        $zdata=substr(substr($zdata, 0, strlen($zdata) - 4), 2);
        $fr.=pack('V', $crc);
        $fr.=pack('V', $c_len);
        $fr.=pack('V', $unc_len);
        $fr.=pack('v', strlen($filename));
        $fr.=pack('v', 0);
        $fr.=$filename;

        $fr.=$zdata;

        $fr.=pack('V', $crc);
        $fr.=pack('V', $c_len);
        $fr.=pack('V', $unc_len);

        $this->datasec[]=$fr;
        $new_offset=strlen(implode('', $this->datasec));

        $cdrec="\x50\x4b\x01\x02";
        $cdrec.="\x00\x00";
        $cdrec.="\x14\x00";
        $cdrec.="\x00\x00";
        $cdrec.="\x08\x00";
        $cdrec.=$hexdtime;
        $cdrec.=pack('V', $crc);
        $cdrec.=pack('V', $c_len);
        $cdrec.=pack('V', $unc_len);
        $cdrec.=pack('v', strlen($filename));
        $cdrec.=pack('v', 0);
        $cdrec.=pack('v', 0);
        $cdrec.=pack('v', 0);
        $cdrec.=pack('v', 0);
        $cdrec.=pack('V', 32);

        $cdrec.=pack('V', $this->old_offset);
        $this->old_offset=$new_offset;

        $cdrec.=$filename;
        $this->ctrl_dir[]=$cdrec;
    }


    var $eof_ctrl_dir="\x50\x4b\x05\x06\x00\x00\x00\x00";

    private function file() {
        $data=implode('', $this->datasec);
        $ctrldir=implode('', $this->ctrl_dir);

        return $data.$ctrldir.$this->eof_ctrl_dir.pack('v', sizeof($this->ctrl_dir)).pack('v', sizeof($this->ctrl_dir)).pack('V', strlen($ctrldir)).pack('V', strlen($data))."\x00\x00";
    }


    // ------------------------------------------------------ //
    // #压缩到服务器
    //
    // $archive = new PHPZip();
    // $archive->Zip("需压缩的文件所在目录", "ZIP压缩文件名");
    // ------------------------------------------------------ //
    public function Zip($dir, $saveName) {
        if(@!function_exists('gzcompress')) {
            return;
        }

        ob_end_clean();
        $filelist=$this->visitFile($dir);
        if(count($filelist) == 0) {
            return;
        }

        foreach($filelist as $file) {
            if(!file_exists($file) || !is_file($file)) {
                continue;
            }

            $fd=fopen($file, "rb");
            $content=@fread($fd, filesize($file));
            fclose($fd);

            // 1.删除$dir的字符(./folder/file.txt删除./folder/)
            // 2.如果存在/就删除(/file.txt删除/)
            $file=substr($file, strlen($dir));
            if(substr($file, 0, 1) == "\\" || substr($file, 0, 1) == "/") {
                $file=substr($file, 1);
            }

            $this->addFile($content, $file);
        }
        $out=$this->file();

        $fp=fopen($saveName, "wb");
        fwrite($fp, $out, strlen($out));
        fclose($fp);
    }


    // ------------------------------------------------------ //
    // #压缩并直接下载
    //
    // $archive = new PHPZip();
    // $archive->ZipAndDownload("需压缩的文件所在目录");
    // ------------------------------------------------------ //
    public function ZipAndDownload($dir) {
        if(@!function_exists('gzcompress')) {
            return;
        }

        ob_end_clean();
        $filelist=$this->visitFile($dir);
        if(count($filelist) == 0) {
            return;
        }

        foreach($filelist as $file) {
            if(!file_exists($file) || !is_file($file)) {
                continue;
            }

            $fd=fopen($file, "rb");
            $content=@fread($fd, filesize($file));
            fclose($fd);

            // 1.删除$dir的字符(./folder/file.txt删除./folder/)
            // 2.如果存在/就删除(/file.txt删除/)
            $file=substr($file, strlen($dir));
            if(substr($file, 0, 1) == "\\" || substr($file, 0, 1) == "/") {
                $file=substr($file, 1);
            }

            $this->addFile($content, $file);
        }
        $out=$this->file();

        @header('Content-Encoding: none');
        @header('Content-Type: application/zip');
        @header('Content-Disposition: attachment ; filename=Farticle'.date("YmdHis", time()).'.zip');
        @header('Pragma: no-cache');
        @header('Expires: 0');
        print($out);
    }





    /**********************************************************
     * 解压部分
     **********************************************************/
    // ------------------------------------------------------ //
    // ReadCentralDir($zip, $zipfile)
    // $zip是经过@fopen($zipfile, 'rb')打开的
    // $zipfile是zip文件的路径
    // ------------------------------------------------------ //
    private function ReadCentralDir($zip, $zipfile) {
        $size=filesize($zipfile);
        $max_size=($size < 277) ? $size : 277;

        @fseek($zip, $size - $max_size);
        $pos=ftell($zip);
        $bytes=0x00000000;

        while($pos < $size) {
            $byte=@fread($zip, 1);
            $bytes=($bytes << 8) | Ord($byte);
            $pos++;
            if($bytes == 0x504b0506) {
                break;
            }
        }

        $data=unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', fread($zip, 18));

        $centd['comment']=($data['comment_size'] != 0) ? fread($zip, $data['comment_size']) : '';  // 注释
        $centd['entries']=$data['entries'];
        $centd['disk_entries']=$data['disk_entries'];
        $centd['offset']=$data['offset'];
        $centd['disk_start']=$data['disk_start'];
        $centd['size']=$data['size'];
        $centd['disk']=$data['disk'];
        return $centd;
    }


    private function ReadCentralFileHeaders($zip) {
        $binary_data=fread($zip, 46);
        $header=unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);

        $header['filename']=($header['filename_len'] != 0) ? fread($zip, $header['filename_len']) : '';
        $header['extra']=($header['extra_len'] != 0) ? fread($zip, $header['extra_len']) : '';
        $header['comment']=($header['comment_len'] != 0) ? fread($zip, $header['comment_len']) : '';


        if($header['mdate'] && $header['mtime']) {
            $hour=($header['mtime'] & 0xF800) >> 11;
            $minute=($header['mtime'] & 0x07E0) >> 5;
            $seconde=($header['mtime'] & 0x001F) * 2;
            $year=(($header['mdate'] & 0xFE00) >> 9) + 1980;
            $month=($header['mdate'] & 0x01E0) >> 5;
            $day=$header['mdate'] & 0x001F;
            $header['mtime']=mktime($hour, $minute, $seconde, $month, $day, $year);
        }
        else {
            $header['mtime']=time();
        }
        $header['stored_filename']=$header['filename'];
        $header['status']='ok';
        if(substr($header['filename'], -1) == '/') {
            $header['external']=0x41FF0010;
        }  // 判断是否文件夹
        return $header;
    }


    private function ReadFileHeader($zip) {
        $binary_data=fread($zip, 30);
        $data=unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);

        $header['filename']=fread($zip, $data['filename_len']);
        $header['extra']=($data['extra_len'] != 0) ? fread($zip, $data['extra_len']) : '';
        $header['compression']=$data['compression'];
        $header['size']=$data['size'];
        $header['compressed_size']=$data['compressed_size'];
        $header['crc']=$data['crc'];
        $header['flag']=$data['flag'];
        $header['mdate']=$data['mdate'];
        $header['mtime']=$data['mtime'];

        if($header['mdate'] && $header['mtime']) {
            $hour=($header['mtime'] & 0xF800) >> 11;
            $minute=($header['mtime'] & 0x07E0) >> 5;
            $seconde=($header['mtime'] & 0x001F) * 2;
            $year=(($header['mdate'] & 0xFE00) >> 9) + 1980;
            $month=($header['mdate'] & 0x01E0) >> 5;
            $day=$header['mdate'] & 0x001F;
            $header['mtime']=mktime($hour, $minute, $seconde, $month, $day, $year);
        }
        else {
            $header['mtime']=time();
        }

        $header['stored_filename']=$header['filename'];
        $header['status']="ok";
        return $header;
    }


    private function ExtractFile($header, $to, $zip) {
        $header=$this->readfileheader($zip);

        if(substr($to, -1) != "/") {
            $to.="/";
        }
        if(!@is_dir($to)) {
            @mkdir($to, 0777);
        }

        $pth=explode("/", dirname($header['filename']));
        $pthss=''; //+++
        for($i=0; isset($pth[$i]); $i++) {
            if(!$pth[$i]) {
                continue;
            }
            $pthss.=$pth[$i]."/";
            if(!is_dir($to.$pthss)) {
                @mkdir($to.$pthss, 0777);
            }
        }

        if(!($header['external'] == 0x41FF0010) && !($header['external'] == 16)) {
            if($header['compression'] == 0) {
                $fp=@fopen($to.$header['filename'], 'wb');
                if(!$fp) {
                    return (-1);
                }
                $size=$header['compressed_size'];

                while($size != 0) {
                    $read_size=($size < 2048 ? $size : 2048);
                    $buffer=fread($zip, $read_size);
                    $binary_data=pack('a'.$read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size-=$read_size;
                }
                fclose($fp);
                touch($to.$header['filename'], $header['mtime']);

            }
            else {

                $fp=@fopen($to.$header['filename'].'.gz', 'wb');
                if(!$fp) {
                    return (-1);
                }
                $binary_data=pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']), Chr(0x00), time(), Chr(0x00), Chr(3));

                fwrite($fp, $binary_data, 10);
                $size=$header['compressed_size'];

                while($size != 0) {
                    $read_size=($size < 1024 ? $size : 1024);
                    $buffer=fread($zip, $read_size);
                    $binary_data=pack('a'.$read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size-=$read_size;
                }

                $binary_data=pack('VV', $header['crc'], $header['size']);
                fwrite($fp, $binary_data, 8);
                fclose($fp);

                $gzp=@gzopen($to.$header['filename'].'.gz', 'rb') or die("Cette archive est compress!");

                if(!$gzp) {
                    return (-2);
                }
                $fp=@fopen($to.$header['filename'], 'wb');
                if(!$fp) {
                    return (-1);
                }
                $size=$header['size'];

                while($size != 0) {
                    $read_size=($size < 2048 ? $size : 2048);
                    $buffer=gzread($gzp, $read_size);
                    $binary_data=pack('a'.$read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size-=$read_size;
                }
                fclose($fp);
                gzclose($gzp);

                touch($to.$header['filename'], $header['mtime']);
                @unlink($to.$header['filename'].'.gz');
            }
        }
        return true;
    }


    // ------------------------------------------------------ //
    // #解压文件
    //
    // $archive   = new PHPZip();
    // $zipfile   = "ZIP压缩文件名";
    // $savepath  = "解压缩目录名";
    // $zipfile   = $unzipfile;
    // $savepath  = $unziptarget;
    // $array     = $archive->GetZipInnerFilesInfo($zipfile);
    // $filecount = 0;
    // $dircount  = 0;
    // $failfiles = array();
    // set_time_limit(0);  // 修改为不限制超时时间(默认为30秒)
    //
    // for($i=0; $i<count($array); $i++) {
    //     if($array[$i][folder] == 0){
    //         if($archive->unZip($zipfile, $savepath, $i) > 0){
    //             $filecount++;
    //         }else{
    //             $failfiles[] = $array[$i][filename];
    //         }
    //     }else{
    //         $dircount++;
    //     }
    // }
    // set_time_limit(30);
    //printf("文件夹:%d&nbsp;&nbsp;&nbsp;&nbsp;解压文件:%d&nbsp;&nbsp;&nbsp;&nbsp;失败:%d<br>\r\n", $dircount, $filecount, count($failfiles));
    //if(count($failfiles) > 0){
    //    foreach($failfiles as $file){
    //        printf("&middot;%s<br>\r\n", $file);
    //    }
    //}
    // ------------------------------------------------------ //
    public function unZip($zipfile, $to, $index=Array(-1)) {
        $ok=0;
        $zip=@fopen($zipfile, 'rb');
        if(!$zip) {
            return (-1);
        }

        $cdir=$this->ReadCentralDir($zip, $zipfile);
        $pos_entry=$cdir['offset'];

        if(!is_array($index)) {
            $index=array($index);
        }
        for($i=0; $index[$i]; $i++) {
            if(intval($index[$i]) != $index[$i] || $index[$i] > $cdir['entries']) {
                return (-1);
            }
        }

        for($i=0; $i < $cdir['entries']; $i++) {
            @fseek($zip, $pos_entry);
            $header=$this->ReadCentralFileHeaders($zip);
            $header['index']=$i;
            $pos_entry=ftell($zip);
            @rewind($zip);
            fseek($zip, $header['offset']);
            if(in_array("-1", $index) || in_array($i, $index)) {
                $stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);
            }
        }

        fclose($zip);
        return $stat;
    }





    /**********************************************************
     * 其它部分
     **********************************************************/
    // ------------------------------------------------------ //
    // #获取被压缩文件的信息
    //
    // $archive = new PHPZip();
    // $array = $archive->GetZipInnerFilesInfo(ZIP压缩文件名);
    // for($i=0; $i<count($array); $i++) {
    //     printf("<b>&middot;%s</b><br>\r\n", $array[$i][filename]);
    //     foreach($array[$i] as $key => $value)
    //         printf("%s => %s<br>\r\n", $key, $value);
    //     print "\r\n<p>------------------------------------<p>\r\n\r\n";
    // }
    // ------------------------------------------------------ //
    public function GetZipInnerFilesInfo($zipfile) {
        $zip=@fopen($zipfile, 'rb');
        if(!$zip) {
            return (0);
        }
        $centd=$this->ReadCentralDir($zip, $zipfile);

        @rewind($zip);
        @fseek($zip, $centd['offset']);
        $ret=array();

        for($i=0; $i < $centd['entries']; $i++) {
            $header=$this->ReadCentralFileHeaders($zip);
            $header['index']=$i;
            $info=array('filename'=>$header['filename'],                   // 文件名
                'stored_filename'=>$header['stored_filename'],            // 压缩后文件名
                'size'=>$header['size'],                       // 大小
                'compressed_size'=>$header['compressed_size'],            // 压缩后大小
                'crc'=>strtoupper(dechex($header['crc'])),    // CRC32
                'mtime'=>date("Y-m-d H:i:s", $header['mtime']),  // 文件修改时间
                'comment'=>$header['comment'],                    // 注释
                'folder'=>($header['external'] == 0x41FF0010 || $header['external'] == 16) ? 1 : 0,  // 是否为文件夹
                'index'=>$header['index'],                      // 文件索引
                'status'=>$header['status']                      // 状态
            );
            $ret[]=$info;
            unset($header);
        }
        fclose($zip);
        return $ret;
    }


    // ------------------------------------------------------ //
    // #获取压缩文件的注释
    //
    // $archive = new PHPZip();
    // echo $archive->GetZipComment(ZIP压缩文件名);
    // ------------------------------------------------------ //
    public function GetZipComment($zipfile) {
        $zip=@fopen($zipfile, 'rb');
        if(!$zip) {
            return (0);
        }
        $centd=$this->ReadCentralDir($zip, $zipfile);
        fclose($zip);
        return $centd[comment];
    }
}

/*
?>



    <form method="post">
        压缩到服务器:
        <br>------------------<br>
        压缩目录:　　　　　<input name="zipdir" type="text" id="zipdir"/>(例如./folder)<br>
        另存为路径和文件名:<input name="savename" type="text" id="savename"/>(例如./folder/file.zip)(需要填写扩展名)<br>
        <input name="zip" type="submit" id="zip" value="压缩"/><br>
        <br><br><br>

        压缩并下载
        <br>------------------<br>
        文件所在目录:<input name="zipdowndir" type="text" id="zipdowndir"/>(例如./folder)<br>
        <input name="zipdown" type="submit" id="zipdown" value="压缩并下载"/>
        <br><br><br>

        在线解压zip
        <br>------------------<br>
        文件:　<input name="unzipfile" type="text" id="unzipfile"/>(例如./folder/file.zip)<br>
        解压到:<input name="unziptarget" type="text" id="unziptarget"/>(例如./folder)<br>
        <input name="unzip" type="submit" id="unzip" value="解压"/>
        <br><br><br>

        读取压缩文件内部文件信息和注释
        <br>------------------<br>
        文件:<input name="readfile" type="text" id="readfile"/>(例如./folder/file.zip)<br>
        <input name="readfileinfo" type="submit" id="readfileinfo" value="读取内部文件信息"/>
        <input name="readcomment" type="submit" id="readcomment" value="读取注释"/>
    </form>
<?
echo "<p><p>\r\n";
echo "<br>--------------------------<br>\r\n";
echo "显示信息:\r\n";
echo "<br>--------------------------<br>\r\n";

$archive=new PHPZip();
if(!empty($zip)) {
    $archive->Zip($zipdir, $savename);
}
elseif(!empty($zipdown)) {
    $archive->ZipAndDownload($zipdowndir);
}
elseif(!empty($unzip)) {
    $zipfile=$unzipfile;
    $savepath=$unziptarget;
    $array=$archive->GetZipInnerFilesInfo($zipfile);
    $filecount=0;
    $dircount=0;
    $failfiles=array();
    set_time_limit(0);  // 修改为不限制超时时间(默认为30秒)

    for($i=0; $i < count($array); $i++) {
        if($array[$i][folder] == 0) {
            if($archive->unZip($zipfile, $savepath, $i) > 0) {
                $filecount++;
            }
            else {
                $failfiles[]=$array[$i][filename];
            }
        }
        else {
            $dircount++;
        }
    }

    set_time_limit(30);

    printf("文件夹:%d&nbsp;&nbsp;&nbsp;&nbsp;解压文件:%d&nbsp;&nbsp;&nbsp;&nbsp;失败:%d<br>\r\n", $dircount, $filecount, count($failfiles));
    if(count($failfiles) > 0) {
        foreach($failfiles as $file) {
            printf("&middot;%s<br>\r\n", $file);
        }
    }
}
elseif(!empty($readfileinfo)) {
    $array=$archive->GetZipInnerFilesInfo($readfile);
    for($i=0; $i < count($array); $i++) {
        printf("<b>&middot;%s</b><br>\r\n", $array[$i][filename]);
        foreach($array[$i] as $key=>$value)
            printf("%s => %s<br>\r\n", $key, $value);
        print "\r\n<p>------------------------------------<p>\r\n\r\n";
    }
}
elseif(!empty($readcomment)) {
    $comment=$archive->GetZipComment($readfile);
    printf("%s<br>\r\n", $comment);
}
?>

*/