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标题: DISCUZ架构:misc.func.php文件分析一 [打印本页]

作者: ajax 时间: 2008-10-25 23:52
标题: DISCUZ架构:misc.func.php文件分析一
/**
* 这个函数看着很长，其实要实现的功能很少，就是通过ip地址返回一个对应的地理位置
* @para string $ip //给定的ip，要符合点分十进制
*
* @return string
*/
function convertip($ip) {
      if(!preg_match("/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/", $ip)) {
            return '';
      }

      if($fd = @fopen(DISCUZ_ROOT.'./ipdata/wry.dat', 'rb')) {

            $ip = explode('.', $ip);
            $ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];

            $DataBegin = fread($fd, 4);
            $DataEnd = fread($fd, 4);
            $ipbegin = implode('', unpack('L', $DataBegin));
            if($ipbegin < 0) $ipbegin += pow(2, 32);
            $ipend = implode('', unpack('L', $DataEnd));
            if($ipend < 0) $ipend += pow(2, 32);
            $ipAllNum = ($ipend - $ipbegin) / 7 + 1;

            $BeginNum = 0;
            $EndNum = $ipAllNum;

            while($ip1num > $ipNum || $ip2num < $ipNum) {
                     $Middle= intval(($EndNum + $BeginNum) / 2);

                     fseek($fd, $ipbegin + 7 * $Middle);
                     $ipData1 = fread($fd, 4);
                     if(strlen($ipData1) < 4) {
                              fclose($fd);
                              return '- System Error';
                     }
                     $ip1num = implode('', unpack('L', $ipData1));
                     if($ip1num < 0) $ip1num += pow(2, 32);

                     if($ip1num > $ipNum) {
                              $EndNum = $Middle;
                              continue;
                     }

                     $DataSeek = fread($fd, 3);
                     if(strlen($DataSeek) < 3) {
                              fclose($fd);
                              return '- System Error';
                     }
                     $DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
                     fseek($fd, $DataSeek);
                     $ipData2 = fread($fd, 4);
                     if(strlen($ipData2) < 4) {
                              fclose($fd);
                              return '- System Error';
                     }
                     $ip2num = implode('', unpack('L', $ipData2));
                     if($ip2num < 0) $ip2num += pow(2, 32);

                     if($ip2num < $ipNum) {
                              if($Middle == $BeginNum) {
                                    fclose($fd);
                                    return '- Unknown';
                              }
                              $BeginNum = $Middle;
                     }
            }

            $ipFlag = fread($fd, 1);
            if($ipFlag == chr(1)) {
                     $ipSeek = fread($fd, 3);
                     if(strlen($ipSeek) < 3) {
                              fclose($fd);
                              return '- System Error';
                     }
                     $ipSeek = implode('', unpack('L', $ipSeek.chr(0)));
                     fseek($fd, $ipSeek);
                     $ipFlag = fread($fd, 1);
            }

            if($ipFlag == chr(2)) {
                     $AddrSeek = fread($fd, 3);
                     if(strlen($AddrSeek) < 3) {
                              fclose($fd);
                              return '- System Error';
                     }
                     $ipFlag = fread($fd, 1);
                     if($ipFlag == chr(2)) {
                              $AddrSeek2 = fread($fd, 3);
                              if(strlen($AddrSeek2) < 3) {
                                    fclose($fd);
                                    return '- System Error';
                              }
                              $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
                              fseek($fd, $AddrSeek2);
                     } else {
                              fseek($fd, -1, SEEK_CUR);
                     }

                     while(($char = fread($fd, 1)) != chr(0))
                              $ipAddr2 .= $char;

                     $AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
                     fseek($fd, $AddrSeek);

                     while(($char = fread($fd, 1)) != chr(0))
                              $ipAddr1 .= $char;
            } else {
                     fseek($fd, -1, SEEK_CUR);
                     while(($char = fread($fd, 1)) != chr(0))
                              $ipAddr1 .= $char;

                     $ipFlag = fread($fd, 1);
                     if($ipFlag == chr(2)) {
                              $AddrSeek2 = fread($fd, 3);
                              if(strlen($AddrSeek2) < 3) {
                                    fclose($fd);
                                    return '- System Error';
                              }
                              $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
                              fseek($fd, $AddrSeek2);
                     } else {
                              fseek($fd, -1, SEEK_CUR);
                     }
                     while(($char = fread($fd, 1)) != chr(0))
                              $ipAddr2 .= $char;
            }
            fclose($fd);

            if(preg_match('/http/i', $ipAddr2)) {
                     $ipAddr2 = '';
            }
            $ipaddr = "$ipAddr1 $ipAddr2";
            $ipaddr = preg_replace('/CZ88\.NET/is', '', $ipaddr);
            $ipaddr = preg_replace('/^\s*/is', '', $ipaddr);
            $ipaddr = preg_replace('/\s*$/is', '', $ipaddr);
            if(preg_match('/http/i', $ipaddr) || $ipaddr == '') {
                     $ipaddr = '- Unknown';
            }

            return '- '.$ipaddr;

      } else {

            $datadir = DISCUZ_ROOT.'./ipdata/';
            $ip_detail = explode('.', $ip);
            if(file_exists($datadir.$ip_detail[0].'.txt')) {
                     $ip_fdata = @fopen($datadir.$ip_detail[0].'.txt', 'r');
            } else {
                     if(!($ip_fdata = @fopen($datadir.'0.txt', 'r'))) {
                              return '- Invalid IP data file';
                     }
            }
            for($i = 0; $i <= 3; $i++) {
                     $ip_detail[$i] = sprintf('%03d', $ip_detail[$i]);
            }
            $ip = join('.', $ip_detail);
            do {
                     $ip_data = fgets($ip_fdata, 200);
                     $ip_data_detail = explode('|', $ip_data);
                     if($ip >= $ip_data_detail[0] && $ip <= $ip_data_detail[1]) {
                              fclose($ip_fdata);
                              return '- '.$ip_data_detail[2].$ip_data_detail[3];
                     }
            } while(!feof($ip_fdata));
            fclose($ip_fdata);
            return '- UNKNOWN';

      }

}

作者: ajax 时间: 2008-10-25 23:52
/**
* 目前发现这个函数在两个地方用到，search.php和digest.php，这个函数的用处是把从数据库中得到的帖子处理一下，然后给前端显示。
* @para array $thread //从数据库中取出的帖子原始数据
*
* @return array
*/
function procthread($thread) {
      global $dateformat, $timeformat, $timeoffset, $ppp, $colorarray;

      if(empty($colorarray)) {
            $colorarray = array('', 'red', 'orange', 'yellow', 'green', 'cyan', 'blue', 'purple', 'gray');
      }

      $thread['forumname'] = $GLOBALS['_DCACHE']['forums'][$thread['fid']]['name'];
      $thread['dateline'] = gmdate($dateformat, $thread['dateline'] + $timeoffset * 3600);
      $thread['lastpost'] = gmdate("$dateformat $timeformat", $thread['lastpost'] + $timeoffset * 3600);
      $thread['lastposterenc'] = rawurlencode($thread['lastposter']);

      if($thread['replies'] > $thread['views']) {
            $thread['views'] = $thread['replies'];
      }

      $postsnum = $thread['replies'] + 1;
      $pagelinks = '';
      if($postsnum  > $ppp) {
            $posts = $postsnum;
            $topicpages = ceil($posts / $ppp);
            for($i = 1; $i <= $topicpages; $i++) {
                     $pagelinks .= '<a href="viewthread.php?tid='.$thread['tid'].'&page='.$i.'" target="_blank">'.$i.'</a> ';
                     if($i == 6) {
                              $i = $topicpages + 1;
                     }
            }
            if($topicpages > 6) {
                     $pagelinks .= ' .. <a href="viewthread.php?tid='.$thread['tid'].'&page='.$topicpages.'" target="_blank">'.$topicpages.'</a> ';
            }
            $thread['multipage'] = ' ( <img src="'.IMGDIR.'/multipage.gif" class="absmiddle" border="0" alt="" /> '.$pagelinks.')';
      } else {
            $thread['multipage'] = '';
      }

      if($thread['highlight']) {
            $string = sprintf('%02d', $thread['highlight']);
            $stylestr = sprintf('%03b', $string[0]);

            $thread['highlight'] = 'style="';
            $thread['highlight'] .= $stylestr[0] ? 'font-weight: bold;' : '';
            $thread['highlight'] .= $stylestr[1] ? 'font-style: italic;' : '';
            $thread['highlight'] .= $stylestr[2] ? 'text-decoration: underline;' : '';
            $thread['highlight'] .= $string[1] ? 'color: '.$colorarray[$string[1]] : '';
            $thread['highlight'] .= '"';
      } else {
            $thread['highlight'] = '';
      }

      if($thread['attachment']) {
            require_once DISCUZ_ROOT.'./include/attachment.func.php';
            $thread['attachment'] = attachtype($thread['attachment']).' ';
      } else {
            $thread['attachment'] = '';
      }

      return $thread;
}

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