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PHP解压ZIP的一个类_php

php 搞代码 3年前 (2018-06-21) 92次浏览 已收录 0个评论

 

  //以下是类及函数定义

  class Zip //ZIP压缩类

  {

  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);

[email protected]($zip);

[email protected]($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++)

  {

[email protected]($zip, $pos_entry);

  $header = $this->ReadCentralFileHeaders($zip);

  $header['index'] = $i; $pos_entry = ftell($zip);

[email protected]($zip); fseek($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;

[email protected]($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([email protected]_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);

[email protected]($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);

[email protected]($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);

[email protected]($fp, $binary_data, $read_size);

  $size -= $read_size;

  }

  fclose($fp); gzclose($gzp);

  touch($to.$header['filename'], $header['mtime']);

[email protected]($to.$header['filename'].'.gz');

  }}

  return true;

  }

  } //ZIP压缩类end

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