リアルZIPファイル操作クラス(php)

/********************
著者不明
主催: Longbill ( www.longbill.cn ; longbill.cn@gmail.com )
** * ******************/

class zip
{

var $datasec, $ctrl_dir = array();
var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";
var $old_offset = 0; var $dirs = Array(".");

関数 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['コメント'] = $header['コメント'];
$info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
$info['index'] = $header['index'];$info['status'] = $header['status'];
$ret[]=$info; unset($header);
}
return $ret;
}
関数 Add($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],$fn[0],$コンパクト）;
}
return $ret;
}

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

$data を返します 。 $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)) 。 "x00x00";
}

function add_dir($name)
{
$name = str_replace("\", "/", $name); 
$fr = "x50x4bx03x04x0ax00x00x00x00x00x00x00x00x00"; 

$fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($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 = "x50x4bx01x02x00x00x0ax00x00x00x00x00x00x00x00x00"; 
$cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) ); 
$cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 ); 
$ext = "xffxffxffxff"; 
$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]
。 「×」 。 $dtime[2] 。 $dtime[3].'x'.$dtime[0].$dtime[1];
eval('$hexdtime = "' . $hexdtime . '";');

if($compact)
$fr = "x50x4bx03x04x14x00x00x00x08x00".$hexdtime;
else $fr = "x50x4bx03x04x0ax00x00x00x00x00".$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 = "x50x4bx01x02x00x00x14x00x00x00x08x00";
else $cdrec = "x50x4bx01x02x14x00x0ax00x00x00x00x00";
$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;
true を返します。
}

関数 DosTime() {
$timearray = getdate();
if ($timearray['year'] < 1980) {
$timearray['year'] = 1980; $timearray['mon'] = 1;
$timearray['mday'] = 1; $timearray['時間'] = 0;
$timearray['分'] = 0; $timearray['秒'] = 0;
}
return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) |     ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | 
($timearray['分'] << 5) | ($timearray['秒'] >> 1);
}

関数 抽出 ( $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);
$stat を返す;
}

関数 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;$ minutes= ($header['mtime']&0x07E0)>>5;
$secde=($header['mtime']&0x001F)*2;$year=(($header['mdate']&0xFE00)>>9) 1980;
$month=($header['mdate']&0x01E0)>>5;$day=$header['mdate']&0x001F;
$header['mtime'] = mktime($hour, $分, $秒, $月, $日, $年);
}else{$header['mtime'] = time();}

$header['stored_filename'] = $header['filename'];
$header['ステータス'] = "ok";
$header を返す;
}

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;
$ minutes = ($header['mtime'] & 0x07E0) >> 5;
$secde = ($header['mtime'] & 0x001F)*2;
$year = (($header['mdate'] & 0xFE00) >> 9) 1980;
$month = ($header['mdate'] & 0x01E0) >> 5;
$day = $header['mdate'] & 0x001F;
$header['mtime'] = mktime($hour, $分, $秒, $月, $日, $年);
} else {
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['ステータス'] = 'ok';
if (substr($header['filename'], -1) == '/')
$header['external'] = 0x41FF0010;
$header を返す;
}

関数 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); $バイト = 0x00000000;

while ($pos < $size)
{
$byte = @fread($zip, 1); $bytes=($bytes << 8) | Ord($byte);
if ($bytes == 0x504b0506){ $pos ; 壊す; } $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['ディスク'] = $data['ディスク'];
$centd を返す;
}

関数 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;$pthss.=$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.$header['filename'].'.gz','rb') または die("Cette archive est compress");
if(!$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');

}}
true を返します。
}
}
?>

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