archive_tar.php

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			while (false !== ($p_hitem = readdir($p_hdir))) {
				if ($v_filename != ".")
					$p_temp_list[0] = $v_filename.'/'.$p_hitem;
				else
					$p_temp_list[0] = $p_hitem;

				$v_result = $this->_addList($p_temp_list, $p_add_dir, $p_remove_dir);
			}

			unset($p_temp_list);
			unset($p_hdir);
			unset($p_hitem);
		}
	  }

	  return $v_result;
	}
	// }}}

	// {{{ _addFile()
	function _addFile($p_filename, &$p_header, $p_add_dir, $p_remove_dir)
	{
	  if (!$this->_file) {
		  $this->_error('Invalid file descriptor');
		  return false;
	  }

	  if ($p_filename == '') {
		  $this->_error('Invalid file name');
		  return false;
	  }

	  // ----- Calculate the stored filename
	  $p_filename = $this->_translateWinPath($p_filename, false);;
	  $v_stored_filename = $p_filename;
	  if (strcmp($p_filename, $p_remove_dir) == 0) {
		  return true;
	  }
	  if ($p_remove_dir != '') {
		  if (substr($p_remove_dir, -1) != '/')
			  $p_remove_dir .= '/';

		  if (substr($p_filename, 0, strlen($p_remove_dir)) == $p_remove_dir)
			  $v_stored_filename = substr($p_filename, strlen($p_remove_dir));
	  }
	  $v_stored_filename = $this->_translateWinPath($v_stored_filename);
	  if ($p_add_dir != '') {
		  if (substr($p_add_dir, -1) == '/')
			  $v_stored_filename = $p_add_dir.$v_stored_filename;
		  else
			  $v_stored_filename = $p_add_dir.'/'.$v_stored_filename;
	  }

	  $v_stored_filename = $this->_pathReduction($v_stored_filename);

	  if (is_file($p_filename)) {
		  if (($v_file = @fopen($p_filename, "rb")) == 0) {
			  $this->_warning("Unable to open file '$p_filename' in binary read mode");
			  return true;
		  }

		  if (!$this->_writeHeader($p_filename, $v_stored_filename))
			  return false;

		  while (($v_buffer = fread($v_file, 512)) != '') {
			  $v_binary_data = pack("a512", "$v_buffer");
			  $this->_writeBlock($v_binary_data);
		  }

		  fclose($v_file);

	  } else {
		  // ----- Only header for dir
		  if (!$this->_writeHeader($p_filename, $v_stored_filename))
			  return false;
	  }

	  return true;
	}
	// }}}

	// {{{ _addString()
	function _addString($p_filename, $p_string)
	{
	  if (!$this->_file) {
		  $this->_error('Invalid file descriptor');
		  return false;
	  }

	  if ($p_filename == '') {
		  $this->_error('Invalid file name');
		  return false;
	  }

	  // ----- Calculate the stored filename
	  $p_filename = $this->_translateWinPath($p_filename, false);;

	  if (!$this->_writeHeaderBlock($p_filename, strlen($p_string), 0, 0, "", 0, 0))
		  return false;

	  $i=0;
	  while (($v_buffer = substr($p_string, (($i++)*512), 512)) != '') {
		  $v_binary_data = pack("a512", $v_buffer);
		  $this->_writeBlock($v_binary_data);
	  }

	  return true;
	}
	// }}}

	// {{{ _writeHeader()
	function _writeHeader($p_filename, $p_stored_filename)
	{
		if ($p_stored_filename == '')
			$p_stored_filename = $p_filename;
		$v_reduce_filename = $this->_pathReduction($p_stored_filename);

		if (strlen($v_reduce_filename) > 99) {
		  if (!$this->_writeLongHeader($v_reduce_filename))
			return false;
		}

		$v_info = stat($p_filename);
		$v_uid = sprintf("%6s ", DecOct($v_info[4]));
		$v_gid = sprintf("%6s ", DecOct($v_info[5]));
		$v_perms = sprintf("%6s ", DecOct(fileperms($p_filename)));

		$v_mtime = sprintf("%11s", DecOct(filemtime($p_filename)));

		if (@is_dir($p_filename)) {
		  $v_typeflag = "5";
		  $v_size = sprintf("%11s ", DecOct(0));
		} else {
		  $v_typeflag = '';
		  clearstatcache();
		  $v_size = sprintf("%11s ", DecOct(filesize($p_filename)));
		}

		$v_linkname = '';

		$v_magic = '';

		$v_version = '';

		$v_uname = '';

		$v_gname = '';

		$v_devmajor = '';

		$v_devminor = '';

		$v_prefix = '';

		$v_binary_data_first = pack("a100a8a8a8a12A12", $v_reduce_filename, $v_perms, $v_uid, $v_gid, $v_size, $v_mtime);
		$v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $v_typeflag, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');

		// ----- Calculate the checksum
		$v_checksum = 0;
		// ..... First part of the header
		for ($i=0; $i<148; $i++)
			$v_checksum += ord(substr($v_binary_data_first,$i,1));
		// ..... Ignore the checksum value and replace it by ' ' (space)
		for ($i=148; $i<156; $i++)
			$v_checksum += ord(' ');
		// ..... Last part of the header
		for ($i=156, $j=0; $i<512; $i++, $j++)
			$v_checksum += ord(substr($v_binary_data_last,$j,1));

		// ----- Write the first 148 bytes of the header in the archive
		$this->_writeBlock($v_binary_data_first, 148);

		// ----- Write the calculated checksum
		$v_checksum = sprintf("%6s ", DecOct($v_checksum));
		$v_binary_data = pack("a8", $v_checksum);
		$this->_writeBlock($v_binary_data, 8);

		// ----- Write the last 356 bytes of the header in the archive
		$this->_writeBlock($v_binary_data_last, 356);

		return true;
	}
	// }}}

	// {{{ _writeHeaderBlock()
	function _writeHeaderBlock($p_filename, $p_size, $p_mtime=0, $p_perms=0, $p_type='', $p_uid=0, $p_gid=0)
	{
		$p_filename = $this->_pathReduction($p_filename);

		if (strlen($p_filename) > 99) {
		  if (!$this->_writeLongHeader($p_filename))
			return false;
		}

		if ($p_type == "5") {
		  $v_size = sprintf("%11s ", DecOct(0));
		} else {
		  $v_size = sprintf("%11s ", DecOct($p_size));
		}

		$v_uid = sprintf("%6s ", DecOct($p_uid));
		$v_gid = sprintf("%6s ", DecOct($p_gid));
		$v_perms = sprintf("%6s ", DecOct($p_perms));

		$v_mtime = sprintf("%11s", DecOct($p_mtime));

		$v_linkname = '';

		$v_magic = '';

		$v_version = '';

		$v_uname = '';

		$v_gname = '';

		$v_devmajor = '';

		$v_devminor = '';

		$v_prefix = '';

		$v_binary_data_first = pack("a100a8a8a8a12A12", $p_filename, $v_perms, $v_uid, $v_gid, $v_size, $v_mtime);
		$v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $p_type, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');

		// ----- Calculate the checksum
		$v_checksum = 0;
		// ..... First part of the header
		for ($i=0; $i<148; $i++)
			$v_checksum += ord(substr($v_binary_data_first,$i,1));
		// ..... Ignore the checksum value and replace it by ' ' (space)
		for ($i=148; $i<156; $i++)
			$v_checksum += ord(' ');
		// ..... Last part of the header
		for ($i=156, $j=0; $i<512; $i++, $j++)
			$v_checksum += ord(substr($v_binary_data_last,$j,1));

		// ----- Write the first 148 bytes of the header in the archive
		$this->_writeBlock($v_binary_data_first, 148);

		// ----- Write the calculated checksum
		$v_checksum = sprintf("%6s ", DecOct($v_checksum));
		$v_binary_data = pack("a8", $v_checksum);
		$this->_writeBlock($v_binary_data, 8);

		// ----- Write the last 356 bytes of the header in the archive
		$this->_writeBlock($v_binary_data_last, 356);

		return true;
	}
	// }}}

	// {{{ _writeLongHeader()
	function _writeLongHeader($p_filename)
	{
		$v_size = sprintf("%11s ", DecOct(strlen($p_filename)));

		$v_typeflag = 'L';

		$v_linkname = '';

		$v_magic = '';

		$v_version = '';

		$v_uname = '';

		$v_gname = '';

		$v_devmajor = '';

		$v_devminor = '';

		$v_prefix = '';

		$v_binary_data_first = pack("a100a8a8a8a12A12", '././@LongLink', 0, 0, 0, $v_size, 0);
		$v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $v_typeflag, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');

		// ----- Calculate the checksum
		$v_checksum = 0;
		// ..... First part of the header
		for ($i=0; $i<148; $i++)
			$v_checksum += ord(substr($v_binary_data_first,$i,1));
		// ..... Ignore the checksum value and replace it by ' ' (space)
		for ($i=148; $i<156; $i++)
			$v_checksum += ord(' ');
		// ..... Last part of the header
		for ($i=156, $j=0; $i<512; $i++, $j++)
			$v_checksum += ord(substr($v_binary_data_last,$j,1));

		// ----- Write the first 148 bytes of the header in the archive
		$this->_writeBlock($v_binary_data_first, 148);

		// ----- Write the calculated checksum
		$v_checksum = sprintf("%6s ", DecOct($v_checksum));
		$v_binary_data = pack("a8", $v_checksum);
		$this->_writeBlock($v_binary_data, 8);

		// ----- Write the last 356 bytes of the header in the archive
		$this->_writeBlock($v_binary_data_last, 356);

		// ----- Write the filename as content of the block
		$i=0;
		while (($v_buffer = substr($p_filename, (($i++)*512), 512)) != '') {
			$v_binary_data = pack("a512", "$v_buffer");
			$this->_writeBlock($v_binary_data);
		}

		return true;
	}
	// }}}

	// {{{ _readHeader()
	function _readHeader($v_binary_data, &$v_header)
	{
		if (strlen($v_binary_data)==0) {
			$v_header['filename'] = '';
			return true;
		}

		if (strlen($v_binary_data) != 512) {
			$v_header['filename'] = '';
			$this->_error('Invalid block size : '.strlen($v_binary_data));
			return false;
		}

		// ----- Calculate the checksum
		$v_checksum = 0;
		// ..... First part of the header
		for ($i=0; $i<148; $i++)
			$v_checksum+=ord(substr($v_binary_data,$i,1));
		// ..... Ignore the checksum value and replace it by ' ' (space)
		for ($i=148; $i<156; $i++)
			$v_checksum += ord(' ');
		// ..... Last part of the header
		for ($i=156; $i<512; $i++)
			$v_checksum+=ord(substr($v_binary_data,$i,1));

		$v_data = unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1typeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor", $v_binary_data);

		// ----- Extract the checksum
		$v_header['checksum'] = OctDec(trim($v_data['checksum']));
		if ($v_header['checksum'] != $v_checksum) {
			$v_header['filename'] = '';

			// ----- Look for last block (empty block)
			if (($v_checksum == 256) && ($v_header['checksum'] == 0))
				return true;

			$this->_error('Invalid checksum for file "'.$v_data['filename'].'" : '.$v_checksum.' calculated, '.$v_header['checksum'].' expected');
			return false;
		}

		// ----- Extract the properties
		$v_header['filename'] = trim($v_data['filename']);
		$v_header['mode'] = OctDec(trim($v_data['mode']));
		$v_header['uid'] = OctDec(trim($v_data['uid']));
		$v_header['gid'] = OctDec(trim($v_data['gid']));
		$v_header['size'] = OctDec(trim($v_data['size']));
		$v_header['mtime'] = OctDec(trim($v_data['mtime']));
		if (($v_header['typeflag'] = $v_data['typeflag']) == "5") {
		  $v_header['size'] = 0;
		}
		/* ----- All these fields are removed form the header because they do not carry interesting info
		$v_header[link] = trim($v_data[link]);
		$v_header[magic] = trim($v_data[magic]);
		$v_header[version] = trim($v_data[version]);
		$v_header[uname] = trim($v_data[uname]);
		$v_header[gname] = trim($v_data[gname]);
		$v_header[devmajor] = trim($v_data[devmajor]);
		$v_header[devminor] = trim($v_data[devminor]);
		*/

		return true;
	}
	// }}}

	// {{{ _readLongHeader()
	function _readLongHeader(&$v_header)
	{
	  $v_filename = '';
	  $n = floor($v_header['size']/512);
	  for ($i=0; $i<$n; $i++) {
		$v_content = $this->_readBlock();
		$v_filename .= $v_content;
	  }
	  if (($v_header['size'] % 512) != 0) {
		$v_content = $this->_readBlock();
		$v_filename .= $v_content;
	  }

	  // ----- Read the next header
	  $v_binary_data = $this->_readBlock();

	  if (!$this->_readHeader($v_binary_data, $v_header))
		return false;

	  $v_header['filename'] = $v_filename;

	  return true;
	}
	// }}}

	// {{{ _extractInString()
	/**
	* This method extract from the archive one file identified by $p_filename.
	* The return value is a string with the file content, or NULL on error.
	* @param string $p_filename	 The path of the file to extract in a string.
	* @return						a string with the file content or NULL.
	* @access private
	*/
	function _extractInString($p_filename)
	{
		$v_result_str = "";
		$v_header = array();

		While (strlen($v_binary_data = $this->_readBlock()) != 0)