Fulltext boolean search v.2.2 for vB

Hello all!

Moving here from beta forum
https://vborg.vbsupport.ru/showthread.php?t=62218

This hack makes nearly same for vB3 as
[vB 2.2.x] - Mysql 4 Search hack
https://vborg.vbsupport.ru/showthread.php?t=51716
for vB2

You will need MySQL server v4.0.1 or better (but sometimes it may work on 3.23.xx). After installing you will be able to search with empty native vB index (word and postindex tables) and using modifiers.
Allowed modifiers + are ,-, * and "
All modifiers except * should be used only once for one word (in the beginning and without space).
* it should be used at the end of a word.
For example:
windows unix -> will find messages containing at least one these words.
+windows +unix -> will find messages with both this words.
windows* -> will find "windows", "windowss", "windowssauce" or "windowst".
*indows will NOT find "windows"
"some words" -> will find "some words of wisdom", but will not find "some extra words".
Search phrase length limitations replaced with results number limitation.
Value of old "Search Index Maximum Word Length" used to limit number of posts in the result returned by fulltext search (control panel/Message Searching Options)
Supposed that it must run faster then native vB search

History:
v.2.2 [5 Apr 2004]
- search words relevance (when sort by relevance) added at last
but little different then native vB (it may not work when searching with * modifiers)
- attempt to fix incompatibility with other hacks
=to upgrade replace code block #5 in search.php with latest one

v.2.1 [4 Apr 2004]
- Excluding from search forums with "Index New Posts in Search Engine" option set to "No"

v.2.0 [30 Mar 2004]
-"Similar Threads" now must start working (to move from 1.x to 2 just change one more script - functions_search.php)

v.1.9 [29 Mar 2004]
-checking if $query string is not empty before running fill text sql

v.1.8 [20 Mar 2004]
- line numbers and higlight code changed for VB3 Gold
- more tests and error explanations

v.1.7 [9 Mar 2004]
- MySQL error for administrators bug fixed
checking is $not_forumid string exixts before adding it to query

v.1.6 [9 Mar 2004]
- national letters bug fixed
preg_replace("~[^\w\"\-+\* ]~i", "", $query);
was replaced by
preg_replace("~[^\w\xC0-\xFF\"\-+\* ]~i", "", $query);

v.1.5 [8 Mar 2004]
- TABLE_PREFIX bug fixed
- slightly optimised SQL requests

v.1.4 [8 Mar 2004]
- delete_post_index function turned off
- more tests and error explanations

v.1.3 [7 Mar 2004]
- less code because of using native vB $postQueryLogic and $threadQueryLogic conditions
- more tests and error explanations

v.1.2 [7 Mar 2004]
- boolean mode can be turned off in AdminCP ("Allow Search Wild Cards" setting)
- "titles only" search fixed
- limiting number of matches retunned by fulltext search AFTER applying search conditions

v.1.1 [7 Mar 2004]
- HighLight support added

[Nitesh]

Thanks for the hack

I put this hack on my forums which has 1.1 million posts... the search works ok but unfortunately the server load has gone up now.
Current Server Load Averages: 2.75 2.48 2.45 | 161 Users Online (119 members and 42 guests)
It used to be around 1 before this hack was installed. Have you got any ideas on this?

[JohnWoo]

hmm...
Sorry Nitesh, but I had no chance to test it with more then 400.00 posts... And just now have no idea how to fight with it...
do you remember your server load numbers before instslling?

[Nitesh]

Its aright John

It seems my server load is fluctuating now...
Server Load Averages: 1.10 1.40 2.16 | 174 Users Online (135 members and 39 guests).
I?m on a dedicated server so there aren?t any other scripts... I think it maybe just being odd loll... I'll keep an eye on it and keep you informed.

I couldn't get simular threads to work with this either, is that included with this hack?

Anyway thank you for the hard work you've put on this script, saved me about 20 hours of search index rebuilding!

[JohnWoo]

But I still thinking at "simular threads" and have no good (and not heavy for server) solution for it. But feel that it is somewhere near

[Erwin]

I have almost 2 million posts. Anyone installed this hack on a larger forum? I don't want to have to reindex my search table if this doesn't work.

[ImportPassion]

aww...c'mon, be a sport Erwin. Erwin! Erwin!

[JohnWoo]

besides why not to change scripts without touching functions_databuild.php and current words and posts index? after it you will be able to return back to standard without reindexing

[Erwin]

Originally Posted by JohnWoo

besides why not to change scripts without touching functions_databuild.php and current words and posts index? after it you will be able to return back to standard without reindexing

That's true. I may try this when I find time.

[mtha]

2. [That HighLight part can be buggy and need more testing.... Be carefull.]
you may skip this step and loose find words hightlighing

yes it is buggy

I tried on my board, with UTF-8 text, and the highlight is broken (when highlighting utf-8 chars)

I may wait for a solution for it, before puting this cool hack in use.

[JohnWoo]

Sorry, but just now I have no idea how to test it with UTF-8
Will think, but can't promice someting...