src/Archive/Tar.php
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("%011s", DecOct(0));
        } else {
          $v_size = sprintf("%011s", DecOct($p_size));
        }

        $v_uid = sprintf("%07s", DecOct($p_uid));
        $v_gid = sprintf("%07s", DecOct($p_gid));
        $v_perms = sprintf("%07s", DecOct($p_perms & 000777));

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

        $v_linkname = '';

        $v_magic = 'ustar ';

        $v_version = ' ';

        if (function_exists('posix_getpwuid'))
        {
          $userinfo = posix_getpwuid($p_uid);
          $groupinfo = posix_getgrgid($p_gid);
          
          $v_uname = $userinfo['name'];
          $v_gname = $groupinfo['name'];
        }
        else
        {
          $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
        $v_checksum = sprintf("%06s ", DecOct($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;
    }
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("%011s", DecOct(0));
        } else {
          $v_size = sprintf("%011s", DecOct($p_size));
        }

        $v_uid = sprintf("%07s", DecOct($p_uid));
        $v_gid = sprintf("%07s", DecOct($p_gid));
        $v_perms = sprintf("%07s", DecOct($p_perms & 000777));

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

        $v_linkname = '';

        $v_magic = 'ustar ';

        $v_version = ' ';

        if (function_exists('posix_getpwuid'))
        {
          $userinfo = posix_getpwuid($p_uid);
          $groupinfo = posix_getgrgid($p_gid);
          
          $v_uname = $userinfo['name'];
          $v_gname = $groupinfo['name'];
        }
        else
        {
          $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
        $v_checksum = sprintf("%06s ", DecOct($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()