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有时候需要输出服务器上某个文件夹的全部文件，比如备份网站，

函数库代码PHPZip为：(请复制以下代码保存，以供调用）

   StrPath);    header('Content-Encoding: none');    header('Content-Type: application/zip');    header('Content-Disposition: attachment ; filename='.Str_Replace(".zip","",basename($zipfilename)).'.zip');    header('Pragma: no-cache');    header('Expires: 0');    print($out);    }    //压缩后保存在服务器,默认在/@Upload下    FunctionSaveFile($curdir,$zipfilename,$out){    $curdir=Str_iReplace(basename($curdir),"",$curdir);    chdir($curdir.$this->StrPath);    $fp=fopen($zipfilename,"wb");    fwrite($fp,$out,strlen($out));    fclose($fp);    }    //函数用途:压缩文件夹,递归逐层进行    //参数详解:$dir需要压缩的目录,$zipfilename压缩后的文件名及存放路径,$Todo处理方式1提供下载2保存文件在服务器    FunctionZipDir($dir,$zipfilename,$Todo){    IF(!@Function_exists('gzcompress')){Return0;}    @set_time_limit("0");    $this->openFile($dir,$zipfilename);    $out=$this -> filezip();    Switch($Todo){    Case"1":    $this ->DownLoad(__FILE__,$zipfilename,$out);    Break;    Case"2":    $this ->SaveFile(__FILE__,$zipfilename,$out);    Break;    }    }    //函数用途:压缩文件,可以是单个也可以是数组的多个    //参数详解:$file需要压缩的文件(可为数组),$zipfilename压缩后的文件名及存放路径,$Todo处理方式1提供下载2保存文件在服务器    FunctionZipFile($file,$zipfilename,$Todo){    IF(!@Function_exists('gzcompress')){Return0;}    IF(is_array($file)){    Foreach($fileas$filename){    IF(is_file($filename)){    $fd=fopen($filename,"rb");    $content= @fread($fd,filesize($filename));    fclose($fd);    $filename=basename($filename);    $this ->addFile($content,$filename);    }    }    }Else{    IF(is_file($file)){    $fd=fopen($file,"rb");    $content= @fread($fd,filesize($file));    fclose($fd);    $file=basename($file);    $this ->addFile($content,$file);    }    }    $out=$this ->filezip();    Switch($Todo){    Case"1":    $this ->DownLoad(__FILE__,$zipfilename,$out);    Break;    Case"2":    $this ->SaveFile(__FILE__,$zipfilename,$out);    Break;    }    }    //递归取得下层文件夹下的文件    FunctionopenFile($path,$zipName){    $temp_path=$path;    $temp_zip_path=$zipName;    IF($handle=@opendir($path)){    While(false !== ($file=readdir($handle))){    IF($file !='.'and$file !='..'){    IF(ereg('\.' ,$file.@basename())){    $fd=fopen($path.'/'.$file,"r");    $fileValue=@fread($fd,1024000);    fclose($fd);    $this ->addFile($fileValue,$path.'/'.$file);    }Else{    $this ->openFile($path.'/'.$file,$zipName.'/'.$file);    }    }    }    $zipName=$temp_zip_path;    $path=$temp_path;    closedir($handle);    }    }    FunctionaddFile($data,$name,$time=0){    $name=str_replace('\\','/',$name);    $name=str_replace('./','',str_replace('../','',$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="\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);    $fr.=pack('v',strlen($name));    $fr.=pack('v',0);    $fr.=$name;    $fr.=$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);    $cdrec.=pack('v',strlen($name));    $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;    $cdrec.=$name;    $this ->ctrl_dir[]=$cdrec;    }    Functionfilezip(){    $data=implode('',$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($data))."\x00\x00";    }    Functionunix2DosTime($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) | ($timearray['seconds'] >> 1);    }    /*    解压缩部分    用途:解压缩文件    参数:$zn需要解压缩的zip文件及路径,$to解压缩的目的地    */    FunctionUnzip_File($zn,$to,$index =Array(-1)){    $ok =0;    $zip = @fopen($zn,'rb');    IF(!$zip){
  Return(-1);}    $cdir =$this ->ReadCentralDir($zip,$zn);    $pos_entry =$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;    }    //取得压缩包内的文件信息    Functionget_List($zip_name){    $zip = @fopen($zip_name,'rb');    IF(!$zip){
  Return(0);}    $centd =$this ->ReadCentralDir($zip,$zip_name);    @rewind($zip);    @fseek($zip,$centd['offset']);    For($i=0;$i<$centd['entries'];$i++){    $header =$this ->ReadCentralFileHeaders($zip);    $header['index'] = $i;    $info['filename'] = $header['filename'];    $info['stored_filename'] = $header['stored_filename'];    $info['size'] = $header['size'];    $info['compressed_size'] = $header['compressed_size'];    $info['crc'] = strtoupper(dechex($header['crc']));    $info['mtime'] = $header['mtime'];    $info['comment'] = $header['comment'];    $info['folder'] = ($header['external'] == 0x41FF0010 ||$header['external'] == 16)?1:0;    $info['index'] = $header['index'];    $info['status'] = $header['status'];    $ret[] = $info;    unset($header);    }    Return$ret;    }    FunctionReadFileHeader($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,$data['filename_len']);    IF($data['extra_len'] != 0){
  $header['extra'] = fread($zip,$data['extra_len']);}Else{
  $header['extra'] = '';}    $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;    }    FunctionReadCentralFileHeaders($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);    IF($header['filename_len'] != 0)    $header['filename'] = fread($zip,$header['filename_len']);    Else$header['filename'] = '';    IF($header['extra_len'] != 0)    $header['extra'] = fread($zip,$header['extra_len']);    Else$header['extra'] = '';    IF($header['comment_len'] != 0)    $header['comment'] = fread($zip,$header['comment_len']);    Else$header['comment'] = '';    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) == '/')    $header['external'] = 0x41FF0010;    Return$header;    }    FunctionReadCentralDir($zip,$zip_name){    $size =filesize($zip_name);    IF($size < 277){
  $maximum_size = $size;}Else{
  $maximum_size = 277;}    @fseek($zip,$size -$maximum_size);    $pos =ftell($zip);    $bytes =0x00000000;    While($pos < $size){    $byte = @fread($zip,1);    $bytes =($bytes << 8) | Ord($byte);    IF($bytes == 0x504b0506){    $pos++;    break;    }    $pos++;    }    $data =unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',fread($zip,18));    IF($data['comment_size'] != 0){
  $centd['comment'] = fread($zip,$data['comment_size']);}Else{
  $centd['comment'] = '';}    $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;    }    FunctionExtractFile($header,$to,$zip){    $header =$this ->readfileheader($zip);    IF(substr($to, -1) != "/")$to .="/";    IF(!@is_dir($to)) @mkdir($to,0777);    $pth =explode("/",dirname($header['filename']));    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 . $header['filename'] . '.gz','rb')ordie("Cette archive est compress閑");    IF(!$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');    }    }    Returntrue;    }    }    ?>使用方法：    函数:文件压缩    压缩参数:需要压缩的文件或文件夹(文件可为数组),压缩后的zip文件名及存放路径,压缩类型1:文件夹2:文件,后续操作1:压缩后下载;2:存放在服务器上(默认为/@Upload下)    压缩文件夹示例:Tozip("./","../".date("d-H-i-s").".zip",1,2);    压缩文件示例:    $aaa=array("../1.txt","../2.txt");    Tozip($aaa,"../2.zip",2);用法举例：比如有这样一段文件结构：home--upload----1.jpg----2.jpg----3.jpg--web----html------inc--------zip.php(这是上面的代码库）------download.php使用download.php中的代码，实现upload文件夹打包并自动下载：    
   ZipDir($Path,$ZipFile,$Todo);    Break;    Case"2":    $zip->ZipFile($Path,$ZipFile,$Todo);    Break;    }    IF($Todo==1){    Die();    }Else{    ReturnTrue;    }    }    Tozip("././upload","../../upload.zip",1,1)    ?>

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