php zip文件解压类代码

用php实现对zip文件的解压代码。

class zip 
{ 
var $datasec, $ctrl_dir = array(); 
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; 
var $old_offset = 0; var $dirs = Array("."); 
function get_List($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 $ret; 
} 
function Add($files,$compact) 
{ 
if(!is_array($files[0])) $files=Array($files); 
for($i=0;$files[$i];$i++){ 
$fn = $files[$i]; 
if(!in_Array(dirname($fn[0]),$this->dirs)) 
$this->add_Dir(dirname($fn[0])); 
if(basename($fn[0])) 
$ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact); 
} 
return $ret; 
} 
function get_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($data)) . "\x00\x00"; 
} 
function add_dir($name) 
{ 
$name = str_replace("\\", "/", $name); 
$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"; 
$fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) ); 
$fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0); 
$this -> datasec[] = $fr; 
$new_offset = strlen(implode("", $this->datasec)); 
$cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"; 
$cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) ); 
$cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 ); 
$ext = "\xff\xff\xff\xff"; 
$cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name; 
$this -> ctrl_dir[] = $cdrec; 
$this -> old_offset = $new_offset; 
$this -> dirs[] = $name; 
} 
function add_File($data, $name, $compact = 1) 
{ 
$name = str_replace('\\', '/', $name); 
$dtime = dechex($this->DosTime()); 
$hexdtime = '\x' . $dtime[6] . $dtime[7].'\x'.$dtime[4] . $dtime[5] 
. '\x' . $dtime[2] . $dtime[3].'\x'.$dtime[0].$dtime[1]; 
eval('$hexdtime = "' . $hexdtime . '";'); 
if($compact) 
$fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime; 
else $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime; 
$unc_len = strlen($data); $crc = crc32($data); 
if($compact){ 
$zdata = gzcompress($data); $c_len = strlen($zdata); 
$zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); 
}else{ 
$zdata = $data; 
} 
$c_len=strlen($zdata); 
$fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len); 
$fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata; 
$fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len); 
$this -> datasec[] = $fr; 
$new_offset = strlen(implode('', $this->datasec)); 
if($compact) 
$cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00"; 
else $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00"; 
$cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len); 
$cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 ); 
$cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 ); 
$cdrec .= pack('V', $this -> old_offset ); 
$this -> old_offset = $new_offset; 
$cdrec .= $name; 
$this -> ctrl_dir[] = $cdrec; 
return true; 
} 
function DosTime() { 
$timearray = getdate(); 
if ($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); 
} 
function Extract ( $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 $stat; 
} 
function ReadFileHeader($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, $data['filename_len']); 
if ($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 $header; 
} 
function ReadCentralFileHeaders($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', $binary_data); 
if ($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 $header; 
} 
function ReadCentralDir($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 $centd; 
} 
function ExtractFile($header,$to,$zip) 
{ 
$header = $this->readfileheader($zip); 
if(substr($to,-1)!="/") $to.="/"; 
if(!@is_dir($to)) @mkdir($to,0777); 
$pth = explode("/",dirname($header['filename'])); 
for($i=0;isset($pth[$i]);$i++){ 
if(!$pth[$i]) continue; 
if(!is_dir($to.$pth[$i])) @mkdir($to.$pth[$i],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.$header['filename'].'.gz','rb') or die("Cette archive est compresse"); 
if(!$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; 
} 
} 
/***********************************/ 
class zipPeter{ 
    var $_zip_hander = null; 
    function __construct(){ 

    } 
    function get_List($zip_name){ 
        $file_list = array(); 
        $this->_zip_hander = zip_open($zip_name); 
        if ( $this->_zip_hander ) { 
            while ( $zip_entry = zip_read($this->_zip_hander) ) { 
                $file_list[] = array('filename'=>zip_entry_name($zip_entry), 
                                    'size'=>zip_entry_filesize($zip_entry), 
                                    'compressed_size'=>zip_entry_compressedsize($zip_entry) 
                                    ); 
        } 
            zip_close($this->_zip_hander); 
        } 
        return $file_list; 
    } 
    function Extract($zip_name,$folder_name){ 
        $this->_zip_hander = zip_open($zip_name); 
        if ( !$this->checkDirAndMk($folder_name) ){ 
            return false; 
        } 
        if ( substr($folder_name,-1)!="/" ){ 
            $folder_name .= "/"; 
        } 
        if ( $this->_zip_hander ) { 
            while ( $zip_entry = zip_read($this->_zip_hander) ) { 
                $file_info = array('filename'=>zip_entry_name($zip_entry), 
                                    'size'=>zip_entry_filesize($zip_entry), 
                                    'compressed_size'=>zip_entry_compressedsize($zip_entry) 
                                    ); 
                $new_file_name = $folder_name.$file_info['filename']; 
                $buf = ""; 
                if (zip_entry_open($this->_zip_hander, $zip_entry, "r")) { 
                    $buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry)); 
                    zip_entry_close($zip_entry); 
                } 
                if ( $fp = fopen($new_file_name,"w") ){ 
                    fwrite($fp,$buf); 
                    fclose($fp); 
                } 
        } 
            zip_close($this->_zip_hander); 
            return true; 
        } 
        else { 
            return false; 
        } 
    } 
    /** 
     * 检查目录是否存在，如果不存在是否建立 
     * 
     * @param string $dirname        完整的实际路径 
     * @param bool $mk                如果不存在是否创建 
     * @param int $mode                创建权限 
     * @return bool                    是否创建成功 
     */ 
    function checkDirAndMk($dirname,$mk=false,$mode=0777){ 
        if ( is_dir($dirname)==true ){ 
            return true; 
        } 
        else { 
            if ($mk==false){ 
                return false; 
            } 
            else { 
                $dirpath_a = explode('/',$dirname); 
                for ($i=0;$i<count($dirpath_a);$i++){ 
                    if ( $dirpath_a[$i]=="" ){ 
                        continue; 
                    } 
                    if ( $path==""||is_dir($path) ){ 
                        if ( $path=="" ){ 
                            if ( substr(PHP_OS, 0, 3)=="WIN" ){ 
                                $path = $dirpath_a[$i]; 
                            } 
                            else { 
                                $path .= "/".$dirpath_a[$i]; 
                            } 
                        } 
                        else { 
                            $path .= "/".$dirpath_a[$i]; 
                        } 
                        if ( is_dir($path) ){ 
                            continue; 
                        } 
                        else { 
                            @mkdir($path,$mode); 
                        } 
                    } 
                    else { 
                        return false; 
                    } 
                } 
                return true; 
            } 
        } 
    } 
} 


$z = new Zip; 
$lst=$z->get_list('test2.zip'); 
foreach ($lst as $val){ 
    print_r($val)."\n"; 
} 
$zip_obj = new zipPeter(); 
//$zip_obj->Extract() 
$z->Extract('test2.zip', "f:/wytddd", -1 ); 
/***/ 

    require_once("zip.lib.php"); 
set_time_limit(100); 
//要解压的文件路径 
$arch = $_GET["arch"]; 
if(!$arch || !file_exists($arch)) 
$z = new Zip; 
$l=$z->get_list($arch); //得到文件列表 
$z->Extract($arch, "jieya", -1 ); 
}