php工具类之【zip压缩文件处理类】

class PHPZip{
	private $ctrl_dir = array();        
	private $datasec = array(); 
	private $old_offset = 0;       
	private $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";  
	
	/**         
	 * 压缩部分--遍历指定文件夹       
	 * @param String $path--文件夹路径
	 * @return array--文件夹内容列表
	 ****/       
	function visitFile($path){
		$fileList = array();     
		$path = str_replace("\\","/",$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;        
	}        
	/**
	 * 压缩到服务器
	 * @param String $dir--需压缩的文件所在目录
	 * @param String $saveName--ZIP压缩文件名
	 * @return boolean--是否压缩成功
	 * */
	public function Zip($dir, $saveName){            
		if(@!function_exists('gzcompress')){ 
			return false; 
		}                
		ob_end_clean();            
		$filelist = $this->visitFile($dir);            
		if(count($filelist) == 0){ 
			return false; 
		}                
		foreach($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);  
		return true;      
	}       
	/**
	 * 压缩并直接下载
	 * @param String $dir--需压缩的文件所在目录
	 */
	public function ZipAndDownload($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);        
	} 
	// ------------------------------------------------------ //     
	// $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;        
	 }     
	 // ------------------------------------------------------ //        
	 // #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];        
	 } 
	 
	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)| 
				($timearray['seconds'] >> 1);        
	}                               
	private function addFile($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;        
	}                        
	      
	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";        
	}                    
	                
	                                               
	/**********************************************************         
	 *解压部分       
	 *ReadCentralDir($zip, $zipfile)        
	 *@param $zip是经过@fopen($zipfile, 'rb')打开的        
	 *@param $zipfile是zip文件的路径        
	 **/       
	private function ReadCentralDir($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);                
			$pos++;
			if ('Linux' == PHP_OS && substr(dechex($bytes),-8,8) == '504b0506') { break; }
			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       
			if ('Linux' == PHP_OS){
	 	$header['filename']=iconv("gb2312", "UTF-8", $header['filename']);
	 	$header['extra']=iconv("gb2312", "UTF-8", $header['extra']);
	 	$header['stored_filename']=iconv("gb2312", "UTF-8", $header['stored_filename']);     
			}
			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 ('Linux' == PHP_OS){
	 	$header['filename']=iconv("gb2312", "UTF-8", $header['filename']);
	 	$header['extra']=iconv("gb2312", "UTF-8", $header['extra']);
	 	$header['stored_filename']=iconv("gb2312", "UTF-8", $header['stored_filename']);     
			}        
		if($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){  
		if ('Linux' == PHP_OS){
	 	$header['filename']=iconv("gb2312", "UTF-8", $header['filename']);
	 	$header['extra']=iconv("gb2312", "UTF-8", $header['extra']);
	 	$header['stored_filename']=iconv("gb2312", "UTF-8", $header['stored_filename']);     
			}    
		$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.$header['filename'].'.gz', 'rb') or die("Cette archive est compress!");                                        
				if(!$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;        
	}   
}

 

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