Administration Control Panel -> Users and Groups -> Custom profile fields
[Create new field]: antibot (Field identification: antibot, Field type: Numbers)
Display in user control panel: Yes
Display on registration screen: Yes
Required field: Yes
Field name: Anti-Bot check
Field description: 如果您不是机器人，请输入一个130到139之间的数字:
[Profile type specific options]
Lowest allowed number: 130
Highest allowed number: 139
没有用mod，目前为止好像有效，是俺搞完后做的记录，看不明白的可以问，

还有一个办法是使用初始发帖审核，可阻止垃圾帖泛滥，但不能应对注册，设置很简单：
Administration Control Panel -> General -> Post settings
Enable queued posts: Yes
默认的最大帖子数是3，也就是说，只有前3帖通过审核发表后，用户才能自由发帖。
否则你发了他也不显示。。。
注意这个是3.0.0以后版本才有的功能（3.0.0本身木有）

/*—————–[ Everything below this line. ]—————–*/

// PHPBB User Database Plugin. (Requires MySQL Database)
require_once ‘./extensions/Auth_phpbb.php’;

$wgAuth_Config = array(); // Clean.

$wgAuth_Config['WikiGroupName'] = ‘Wiki’; // Name of your PHPBB group
// users need to be a member
// of to use the wiki. (i.e. Wiki)

$wgAuth_Config['UseWikiGroup'] = true; // This tells the Plugin to require
// a user to be a member of the above
// phpBB group. (ie. wiki) Setting
// this to false will let any phpBB
// user edit the wiki.

$wgAuth_Config['UseExtDatabase'] = true; // This tells the plugin that the phpBB tables
// are in a different database then the wiki.
// The default settings is false.

/*-[NOTE: You only need the next four settings if you set $wgAuth_Config['UseExtDatabase'] to true.]-*/
// $wgAuth_Config['MySQL_Host'] = ‘host’; // phpBB MySQL Host Name.
// $wgAuth_Config['MySQL_Username'] = ‘username’; // phpBB MySQL Username.
// $wgAuth_Config['MySQL_Password'] = ‘password’; // phpBB MySQL Password.
// $wgAuth_Config['MySQL_Database'] = ‘database_name’; // phpBB MySQL Database Name.

$wgAuth_Config['UserTB'] = ‘phpbb_users’; // Name of your PHPBB user table. (i.e. phpbb_users)
$wgAuth_Config['GroupsTB'] = ‘phpbb_groups’; // Name of your PHPBB groups table. (i.e. phpbb_groups)
$wgAuth_Config['User_GroupTB'] = ‘phpbb_user_group’; // Name of your PHPBB user_group table. (i.e. phpbb_user_group)
$wgAuth_Config['PathToPHPBB'] = ‘../phpbb3/’; // Path from this file to your phpBB install.

// Local
$wgAuth_Config['LoginMessage'] = ‘You need a phpBB account to login.‘; // Localize this message.
$wgAuth_Config['NoWikiError'] = ‘You are not a member of the required phpBB group.’; // Localize this message.

$wgAuth = new Auth_phpBB($wgAuth_Config); // Auth_PHPBB Plugin.

然后还需要修改Auth_phpbb.php，查找

if (md5($password) == $faryMySQLResult['user_password'] && $this->isMemberOfWikiGroup($username))

替换为：

require_once $this->_PathToPHPBB . ‘includes/functions.php’;
if (phpbb_check_hash($password, $faryMySQLResult['user_password']) && $this->isMemberOfWikiGroup($username))

最后要到论坛上建立对应的用户组，并添加用户。

参考：
1 http://www.mediawiki.org/wiki/Extension:PHPBB/Users_Integration

Notice: in file /includes/functions_upload.php on line 580: mime_content_type() [function.mime-content-type]: can only process string or stream arguments

一直跟踪下来，发现这个$filename是一个空变量，应该是用$source_file这个变量。

在RC1到RC2的升级中，可以进行自动的升级。从RC2之后，好像需要手工确认了，不知道这个改进是好还是不好。
同时，在RC4升级过程中，若你使用了其他语言包，需要注意更新对应的语言包，或者，根据这个帖子进行简单的修改。

dallas2 wrote:I don't know if this is the right thing to do, but in your language pack find common.php file and open it. In that file find:

'NEWEST_USER' => 'Our newest member <strong>%s%s%s</strong>',

(of course, this second line will be in your language). Remove two of those "%s%s%s" so that the final line looks like this:

'NEWEST_USER' => 'Our newest member <strong>%s</strong>',

This removes the error line for me.

cd myforum
sudo wget http://prdownloads.sourceforge.net/phpbb/phpBB-3.0.RC1_to_3.0.RC2.zip?download
sudo unzip phpBB-3.0RC1_to_3.0RC2.zip

然后进入install目录，选择upgrade就可以了。

* [Fix] (X)HTML issues within the templates (Bug #11255, #11255)
* [Fix] Tiny language and grammar changes
* [Fix] Several style related fixes, mainly fixing cross-browser issues
* [Fix] Several RTL fixes within prosilver
* [Fix] MCP looses forum_id in some panels (Bug #11255)
* [Fix] Moderation queue used unfriendly notification of no posts/topics (Bug #11291)
* [Fix] Array in Oracle DBAL not always set (Bug #11475)
* [Fix] Improper continue; in acp_styles.php (Bug #11523)
* [Fix] Imageset editor more friendly (Bug #11511)
* [Fix] Made Custom BBCode validation more strict (Bug #11335)
* [Fix] Proper sync of data on topic copy (Bug #11335)
* [Fix] Introduced ORDER BY clauses to converter queries (Bug #10697)
* [Fix] Stopped bots from getting added to the registered users group during conversion (Bug #11283)
* [Fix] Filled “SMILIEYS_DISABLED” template variable (Bug #11257)
* [Fix] Properly escaped the delimiter in disallowed username comparisons (Bug #11339)
* [Fix] Check global purge setting (Bug #11555)
* [Fix] Improper magic url parsing applied to already parsed [url=] bbcode tag (Bug #11429)
* [Fix] Renamed two indicies for Oracle support (Bug #11457)
* [Fix] Added support for ISO-8859-8(-i) in the character set convertor (Bug #11265, #12039)
* [Fix] Added support for Oracle’s “easy connect naming”
* [Fix] Let Mark/Unmark All work in Manage Drafts (Bug #11679)
* [Fix] Display correct message if no attachments found in user administration (Bug #11629)
* [Fix] Let the “Delete all board cookies” being displayed for guests too (only prosilver) (Bug #11603)
* [Fix] Do not display view topic link in MCP while there is no link present (Bug #11573)
* [Fix] MySQL now properly sorts by post_subject (Bug #11637)
* [Fix] Introduced checks to stop negative postcounts (Bug #11561, #11421)
* [Fix] Allow IP v4/v6 urls for remote avatars (Bug #11633)
* [Fix] Delete avatar files automatically (Bug #11631)
* [Fix] Automatically add selected columns to group by statements in the converter (Bug #11465)
* [Fix] Allow posts without subjects to be clicked in the MCP (Bug #11483)
* [Fix] Sync the forums that shadow topics reside in when the topic that they point to is deleted
* [Fix] Do not use the gen_random_string function to create cookie names during install (Bug #11431)
* [Fix] Send stylesheet in style.php even without a valid session id (Bug #11531)
* [Fix] request_var should strictly return the requested number of dimensions
* [Fix] Correct assignment of custom width to $user->img(); / Correctly display poll bars in subsilver2 (Bug #11301)
* [Fix] Allow removing polls in prosilver
* [Fix] Correct link to post in managing users attachments (Bug #11765)
* [Fix] Reload confirm screen for selecting new forum for global topic type change if not postable forum is chosen (Bug #11711)
* [Fix] Correctly show system default color for disabled options in Internet Explorer which does not support disabled option fields
* [Fix] Update query for custom profiles in user management used wrong order for left/right delimiter (affecting mssql) (Bug #11781)
* [Fix] Inconsistent display of more smileys link fixed (Bug #11801)
* [Fix] Outbox messages are no always neither new nor unread post-conversion (Bug #11461)
* [Feature] Replaced outdated jabber class with the one from the flyspray project
* [Feature] The converter no longer relies on the smiley ID to decide if it should be displayed on the posting page
* [Change] Limit maximum number of allowed characters in messages to 60.000 by default. Admins should increase their PHP time limits if they want to raise this tremedously.
* [Change] Some changes to the conversion documentation
* [Fix] Only use permissions from existing forums during the conversion (Bug #11417)
* [Fix] Do not permit the decimal as a valid prefix character (Bug #11967)
* [Fix] Account for the fact that the IM fields might hold non-IM information
* [Fix] Make the queue function on post details
* [Fix] Check if there are active styles left before deleting a style
* [Fix] Correctly update styles after the deletion of an imageset.
* [Fix] Replaced jabber validation to use the method used by the new jabber class (Bug #9822)
* [Sec] Adding confirm boxes to UCP group actions (ToonArmy)
* [Feature] Added the option to disable the flash bbcode globally (DelvarWorld)
* [Sec] Changed the embedding of Flash (NeoThermic, DelvarWorld)
* [Fix] Use the signature setting for PMs (Bug #12001)
* [Fix] Made the DBMS selection use language variables (Bug #11969)
* [Fix] Make sure that a folder is used when viewing messages to oneself (Bug #12105)
* [Fix] Account for the fact that a board might have no visible Admins (Bug #12185)
* [Fix] Change group ranks even if empty (Bug #12231)
* [Fix] Correctly propagate variables across the custom profile field wizard (Bug #12237)
* [Fix] Correctly move pm’s into folders if more than one is received (Bug #12135)
* [Fix] Corrected various bugs with CPF on multi-language boards (Bug #11803)
* [Fix] Disable notify checkbox in posting editor when board email is disabled (Bug #12263)
* [Fix] Removed maxlength from password/username fields (Bugs #12215, #11797)
* [Fix] Use icon-unsubscribe in prosilver (Bug #12211)
* [Fix] Seperated PREVIOUS/NEXT language vars for pagination and next/previous step (Bug #12197)
* [Feature] append_sid() supporting anchor (Bug #11535) – patch provided by Schumi and ToonArmy
* [Fix] Remember selected language while registering after submit (Bug #11435)
* [Fix] UTF-8 support in theme and template editors (Bug #12251)
* [Fix] Allow for posts per page in the MCP to change during topic selection (Bug #12067)
* [Fix] Remove group avatars upon deletion from all profiles, not just the people having the group as default (Bug #12275, #12267)
* [Fix] Allow for conversions to SQLite (Bug #12279) – patch provided by ToonArmy
* [Fix] Apply colours to guests (Bug #12219)
* [Fix] Set the Admin group as founder_manage during conversion (Bug #12287)
* [Fix] Fixed a special quote BBCode case (Bug #12189)
* [Fix] Correctly parse BBCodes in a post when a poll is being used (Bug #11833)
* [Fix] Remember attached files on PM edit (Bug #12019)
* [Fix] Correctly display poll ending on preview (Bug #12303)
* [Feature] Display the success message on posting longer for posts awaiting approval (Bug #12053)
* [Fix] Display maximum and entered number of characters for the “maximum number of characters exceeded” error messages (Bug #11981)
* [Fix] Wrongly applied setting for allowing links in private messages (used the signature setting instead of the post setting) (Bug #11945)
* [Fix] Unread flag for multipage topic wrongly set under some conditions (Bug #12127) – fix provided by asinshesq
* [Fix] Able to delete posts within user prune panel (Bug #11849)
* [Feature] Allow to specify dimensions of images manually on imageset config (Bug #11675)
* [Fix] Correctly re-assign query result id after seeking rows (MSSQL/Firebird) (Bug #12369)
* [Feature] Make effect of a changed hideonline permission instantaneous
* [Fix] Do not overwrite larger memory values in the installer (Bug #12195)
* [Fix] Order forums on role permission mask (Bug #12337)
* [Fix] Show “no image” image when a non-selectable item was selected in the acp imageset editor – IE (Bug #12423)
* [Fix] Update session information without new pageload (Bug #12393, Bug #12441)
* [Fix] Let polls be edited correctly (Bug #12433)
* [Fix] Overcome Oracle’s inability to handle IN() clauses with over one thousand elements (Bug #12449)
* [Fix] Simulate Firebird’s affected rows mechanism for older versions of PHP
* [Fix] Custom BBCodes properly handle lowercasing of parameterized tags (Bug #12377)
* [Fix] Update the forum_id sequence for PostgreSQL during conversion (Bug #11927)
* [Fix] Allow for multiple tags containing URL and LOCAL_URL tokens (Bug #12473)
* [Fix] Properly display forum list in the MCP Queue (Bug #11313)
* [Fix] Use the localised guest name for quotes (Bug #12483)
* [Fix] Added post anchor to links in default warning message (Bug #12489)
* [Fix] Allow 5 digits in editing time fields (Bug #12489)
* [Fix] MS SQL DBAL drivers now write over extension limitations, they are too low for most installations (Bug #12415)
* [Fix] Fix sorting by author on “unanswered posts” (Bug #12545)
* [Fix] Allow searching for multibyte authors (Bug #11793)
* [Fix] Writing directories/files with correct permissions using FTP for transfers on PHP4
* [Fix] Oracle sequences during conversions are now corrected (Bug #12555)
* [Fix] Allow users to continue after selecting “No” in the merge quickmod confirmation (Bug #12577)
* [Fix] Correctly check permissions on the UCP subscription/bookmark pages (Bug #12595)
* [Fix] Only convert non-orphaned PMs
* [Fix] Fixed a few Postgres related errors (Bug #12587)
* [Feature] New DBAL wrapper for LIKE expressions / sql_like_expression()
* [Sec] Stricter validation of language entries.

因为之前已经写了一个webwiz到phpbb的转换程序，所以再写vbb3到phpbb3的转换程序，比上次要轻松不少，但webwiz的设计思想就是来源于phpbb，所以很多库结构都非常像，而vbb的结构和phpbb有较大差异，在调试过程中还是耗费了大量的时间，回头来看，大约耗费了有一个礼拜的时间。感觉我都能提供有偿论坛转换服务了，哈哈。

转换过程：
首先要进行数据库的UTF8转换。之前论坛采用的是gb2312编码，但论坛上有台湾的注册用户，原来也能显示繁体中文，所以应该采用的是gbk或gb18030的编码。
在进行数据库的备份之前，要在原来的vb论坛后台把附件的存贮方式修改为文件方式，上传头像的存贮方式也修改为文件方式，而customprofilepic我没有找到对应的phpbb设置，所以这一块就直接丢弃了。
然后导出数据库：

mysql -uroot --add-drop-table --default-character-set=latin1 cngis > cngis.sql

进行编码的转换：

iconv -c -f gb18030 -t utf8 cngis.sql > cngisutf8.sql

然后修改此sql文件，替换所有的latin1为utf8，并在文件的开始处添加：

SET NAMES utf8;
SET CHARACTER_SET_CLIENT=utf8;
SET CHARACTER_SET_RESULTS=utf8;

然后新建一个数据库cngisutf8，作为我们的测试数据库并尝试导入此sql文件。

mysql -uroot cngisutf8 < cngisutf8.sql

若在导入过程中没有错误，那么恭喜你，你太幸运了。
我在这一步中遇到错误，导致我以为是中文编码的问题，还以为繁体中文无法正常转换过来呢，后来经过多次测试，发现是转换后的sql文件里存在歧义字符：

\'

导致mysql无法导入，若你也有这个问题，直接去掉那个反斜线就可以了。

安装一个全新的phpbb3。

拷贝我写的vbb3.0.x转换器到phpbb3的install/convertors目录下，并运行相应的转换程序。
在我的转换程序中，给phpbb3默认的数据库结构中添加了两个字段：
一个是users表里添加了一个salt字段，这个是为了无缝转换论坛密码使用的。
一个是topics表里添加了一个goodnees字段，这个是因为我原来的vbb3中使用了精华插件，若你没有使用，可以把相关部分注释掉。
修改论坛的登录程序，使原来的用户可以直接登录，就是修改includes/auth/auth_db.sql文件。

// Check password ...
// added for vb3 conversion
if (!$row['user_pass_convert'] && (md5($password) == $row['user_password']
or md5(md5($password).$row['salt'])==$row['user_password']))
{
if (md5($password)!=$row['user_password'])
{
// Unconverted password
$sql = 'UPDATE ' . USERS_TABLE . '
SET user_password = "'.md5($password).'"
WHERE user_id = ' . $row['user_id'];
$db->sql_query($sql);
}

if ($row['user_login_attempts'] != 0)
{
// Successful, reset login attempts (the user passed all stages)
$sql = 'UPDATE ' . USERS_TABLE . '
SET user_login_attempts = 0
WHERE user_id = ' . $row['user_id'];
$db->sql_query($sql);
}

同时，前面的$sql语句中要添加一个字段：salt。
或者，也可以直接使用我提供的auth_db.php文件。

要注意，这个转换程序对自定义头像导入的功能不细致，还需要进一步处理，但我的论坛上已经够用了，若你的论坛有问题，请反馈给我。
同时，对用户的多组功能也不细致，因为我的论坛上只有2个用户是多组，而且只多1个组，因此转换程序在这儿也进行了简化。
在使用时，请根据自己的实际情况作调整！

授权：GPL2
致谢：
1. shely@ubuntu-cn irc，在编码转换问题上提供了大力帮助。
2. vb3_2phpbb的转换程序，在遇到问题时，首先就参考了这个转换程序。

下载：vb3.0.x convertor

http://www.phpbbchina.com/forum/viewtopic.php?f=5&t=814

出现上述问题的原因主要是词频阈值的设定问题，我将其改为90，重新索引，好了，庆贺一下吧。
若还有问题，请将搜索设定－>搜索后端改为fulltext native，重新索引数据库，该ok了吧？

<wlx> hi, how to display avatar gallery? It is not shown in my phpbb3 forum.
<wlx> and I have change the images/avatars/gallery to mode 777
<wlx> I can upload avatar from my computer, and that does work.
<karlsemple> Have you enabled the gallery avatar setting in the Admin control panel?
<wlx> yes, I do
<karlsemple> and the gallery images are inside subforums inside the gallery folder?
<wlx> sorry, I don't understand your meaning.
<karlsemple> the images do not just go inside the gallery folder
<karlsemple> they have to be inside subfolders
<wlx> the images are in images/avatars/gallery/ directory
<wlx> so they must inside a sub-directory?
<karlsemple> they need to be in subfolders so for example /gallery/cars/
<karlsemple> the subfolders become the categories in gallery selection part of the UCP
<karlsemple> so inside images/avatars/gallery/ you need other folders which will then contain the images
<wlx> oh, yeah, it does work now! thank you, karlsemple !