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 * 16777216 + $ip * 65536 + $ip * 256 + $ip;
$DataBegin = fread($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.'.txt')) {
$ip_fdata = @fopen($datadir.$ip_detail.'.txt', 'r');
} else {
if(!($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 && $ip <= $ip_data_detail) {
fclose($ip_fdata);
return '- '.$ip_data_detail.$ip_data_detail;
}
} while(!feof($ip_fdata));
fclose($ip_fdata);
return '- UNKNOWN';
}
} /**
* 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);
$thread['highlight'] = 'style="';
$thread['highlight'] .= $stylestr ? 'font-weight: bold;' : '';
$thread['highlight'] .= $stylestr ? 'font-style: italic;' : '';
$thread['highlight'] .= $stylestr ? 'text-decoration: underline;' : '';
$thread['highlight'] .= $string ? 'color: '.$colorarray[$string] : '';
$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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