这几天在折腾HDwiki+discuz，系统环境是FreeBSD 10.4, PHP 5.6(HDwiki要求），PHP-PDO_MYSQL,PHP-GD,PHP-XML等，MYSQL 5.7

HDwiki 5.1（6.0安装成功后打开前台，提示http 500错误，找不到原因）
discuz X3.4

因为宽带运营商关闭了80端口，443端口有开，所以就直接用上https，结果问题一大堆。

首先，discuz和ucenter在https下通信失败，后来找到修改方法：

DISCUZ 开启https后ucenter通信失败解决方法，一般是做完301重定向https后通信失败的，下面是具体解决方法：

打开目录 uc_server/model/misc.php 文件；找到69行，插入下面代码：

......
$port = !empty($matches['port']) ? $matches['port'] : ($matches['scheme'] == 'https' ? 443 : 80);//以下为插入代码
if(substr($url,0,5)=='https'){
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
if($post){
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
}
if($cookie){
curl_setopt($ch, CURLOPT_COOKIE, $cookie);
}
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
return curl_exec($ch);
}
//插入代码结束if($post) {$out = "POST $path HTTP/1.0\r\n";
......

接下来设置HDwiki和ucenter，问题比较多了。
一开始，只要设置https，就提示“您输入的URL地址不正确！”
网上也没有任何资料，经过调试，发现要修改HDwiki目录下的control/admin_setting.php的659行

原来长这样：

if(empty($ucapi) || !preg_match("/^(http:\/\/)/i", $ucapi)) {

修改成这样：

if(empty($ucapi) || !preg_match("/^((http:|https:)\/\/)/i", $ucapi)) {

这个问题解决后，出现的是“uc_url_unreachable”错误。走了不少弯路后，发现还是https的问题。
admin_setting.php调用了api/uc_client/client.php里的uc_fopen()，而这个函数使用fsockopen模拟浏览器进行访问。
并且只有拼接了http协议的情况。对这个接口文件的分析，见这篇文章http://blog.csdn.net/yanhui_wei/article/details/17919645

综合这些分析，比较一下discuz的uc_server/model/misc.php和HDwiki下的api/uc_client/client.php，会发现：

discuz的uc_server/model/misc.php里的function dfopen2()和 function dfopen()与HDwiki下的api/uc_client/client.php的uc_fopen2()和uc_fopen()基本上是类似的。

所以解决方法如下：
1、拷贝discuz下的uc_client目录，替换HDwiki下的api/uc_client目录
2、修改api/uc_client/client.php文件，重点在于用function dfopen2()和 function dfopen()的内容替换uc_fopen2()和uc_fopen()，修改完成的结果如下：

function uc_fopen2($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE, $encodetype  = 'URLENCODE') {$__times__ = isset($_GET['__times__']) ? intval($_GET['__times__']) + 1 : 1;if($__times__ > 2) {return '';}$url .= (strpos($url, '?') === FALSE ? '?' : '&')."__times__=$__times__";return uc_fopen($url, $limit, $post, $cookie, $bysocket, $ip, $timeout, $block, $encodetype);}function uc_fopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE    , $ip = '', $timeout = 15, $block = TRUE, $encodetype  = 'URLENCODE') {$return = '';$matches = parse_url($url);$scheme = $matches['scheme'];$host = $matches['host'];$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';$port = !empty($matches['port']) ? $matches['port'] : ($matches['scheme'] == 'https' ? 443 : 80);/*//以下内容可以不需要if($scheme=='https'){$curl = curl_init();curl_setopt($curl, CURLOPT_URL, $url);curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);if($post) {curl_setopt($curl, CURLOPT_POST, 1);curl_setopt($curl, CURLOPT_POSTFIELDS, $post);}if($cookie) {curl_setopt($curl, CURLOPT_COOKIE, $cookie);}curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);curl_setopt($curl, CURLOPT_HEADER, 0);curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);$return = curl_exec($curl);if (curl_errno($curl)) {echo '<pre><b>错误:</b><br />'.curl_error($curl); }curl_close($curl);return $return;}// 结束*/if($post) {$out = "POST $path HTTP/1.0\r\n";$header = "Accept: */*\r\n";$header .= "Accept-Language: zh-cn\r\n";$boundary = $encodetype == 'URLENCODE' ? '' : ';'.substr($post, 0, trim(strpos($post, "\n")));$header .= $encodetype == 'URLENCODE' ? "Content-Type: application/x-www-form-urlencoded\r\n" : "Content-Type: multipart/form-data$boundary\r\n";$header .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";$header .= "Host: $host:$port\r\n";$header .= 'Content-Length: '.strlen($post)."\r\n";$header .= "Connection: Close\r\n";$header .= "Cache-Control: no-cache\r\n";$header .= "Cookie: $cookie\r\n\r\n";$out .= $header.$post;} else {$out = "GET $path HTTP/1.0\r\n";$header = "Accept: */*\r\n";$header .= "Accept-Language: zh-cn\r\n";$header .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";$header .= "Host: $host:$port\r\n";$header .= "Connection: Close\r\n";$header .= "Cookie: $cookie\r\n\r\n";$out .= $header;}$fpflag = 0;if(!$fp = @fsocketopen(($scheme == 'https' ? 'ssl' : $scheme).'://'.($scheme == 'https' ? $host : ($ip ? $ip : $host)), $port, $errno, $errstr, $timeout)) {$context = array('http' => array('method' => $post ? 'POST' : 'GET','header' => $header,'content' => $post,'timeout' => $timeout,),);$context = stream_context_create($context);$fp = @fopen($scheme.'://'.($scheme == 'https' ? $host : ($ip ? $ip : $host)).':'.$port.$path, 'b', false, $context);$fpflag = 1;}if(!$fp) {return '';} else {stream_set_blocking($fp, $block);stream_set_timeout($fp, $timeout);@fwrite($fp, $out);$status = stream_get_meta_data($fp);if(!$status['timed_out']) {while (!feof($fp) && !$fpflag) {if(($header = @fgets($fp)) && ($header == "\r\n" ||  $header == "\n")) {break;}}$stop = false;while(!feof($fp) && !$stop) {$data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));$return .= $data;if($limit) {$limit -= strlen($data);$stop = $limit <= 0;}}}@fclose($fp);return $return;}}
....
//找到同步登录登出代码，修改成以下内容
/*** 进入同步登录代码** @param int $uid        用户ID* @return string         HTML代码*/
function uc_user_synlogin($uid) {$uid = intval($uid);$return = uc_api_post('user', 'synlogin', array('uid'=>$uid));return $return;
}/*** 进入同步登出代码** @return string         HTML代码*/
function uc_user_synlogout() {$return = uc_api_post('user', 'synlogout', array());return $return;
}
....

然后就可以看到一切都正常了。
另外需要注意的是，必须保证ssl证书在有效期内，因为这个，浪费了2天的时间。