sphinx中文全文检索的实现

首先以下是配置文件：

source cv{
type=mysql
sql_host=localhost
sql_user=root
sql_pass=passwod
sql_db=database
sql_query_pre= SET NAMES utf8
sql_query=\
SELECT id, title, introtext,unix_timestamp(created) as addtime \
FROM jos_content
sql_attr_timestamp=addtime
sql_ranged_throttle=0
}
index cv{
source=cv
path=/usr/local/sphinx/var/data/joomlainx
docinfo=extern
mlock=0
stopwords=
min_prefix_len=0
min_infix_len=0
min_word_len=2
charset_type=utf-8
charset_table=U+FF10..U+FF19->0..9, 0..9, U+FF41..U+FF5A->a..z, U+FF21..U+FF3A->a..z,\
A..Z->a..z, a..z, U+0149, U+017F, U+0138, U+00DF, U+00FF, U+00C0..U+00D6->U+00E0..U+00F6,\
U+00E0..U+00F6, U+00D8..U+00DE->U+00F8..U+00FE, U+00F8..U+00FE, U+0100->U+0101, U+0101,\
U+0102->U+0103, U+0103, U+0104->U+0105, U+0105, U+0106->U+0107, U+0107, U+0108->U+0109,\
U+0109, U+010A->U+010B, U+010B, U+010C->U+010D, U+010D, U+010E->U+010F, U+010F,\
U+0110->U+0111, U+0111, U+0112->U+0113, U+0113, U+0114->U+0115, U+0115, U+0116->U+0117,\
U+0117, U+0118->U+0119, U+0119, U+011A->U+011B, U+011B, U+011C->U+011D, U+011D,\
U+011E->U+011F, U+011F, U+0130->U+0131, U+0131, U+0132->U+0133, U+0133, U+0134->U+0135,\
U+0135, U+0136->U+0137, U+0137, U+0139->U+013A, U+013A, U+013B->U+013C, U+013C,\
U+013D->U+013E, U+013E, U+013F->U+0140, U+0140, U+0141->U+0142, U+0142, U+0143->U+0144,\
U+0144, U+0145->U+0146, U+0146, U+0147->U+0148, U+0148, U+014A->U+014B, U+014B,\
U+014C->U+014D, U+014D, U+014E->U+014F, U+014F, U+0150->U+0151, U+0151, U+0152->U+0153,\
U+0153, U+0154->U+0155, U+0155, U+0156->U+0157, U+0157, U+0158->U+0159, U+0159,\
U+015A->U+015B, U+015B, U+015C->U+015D, U+015D, U+015E->U+015F, U+015F, U+0160->U+0161,\
U+0161, U+0162->U+0163, U+0163, U+0164->U+0165, U+0165, U+0166->U+0167, U+0167,\
U+0168->U+0169, U+0169, U+016A->U+016B, U+016B, U+016C->U+016D, U+016D, U+016E->U+016F,\
U+016F, U+0170->U+0171, U+0171, U+0172->U+0173, U+0173, U+0174->U+0175, U+0175,\
U+0176->U+0177, U+0177, U+0178->U+00FF, U+00FF, U+0179->U+017A, U+017A, U+017B->U+017C,\
U+017C, U+017D->U+017E, U+017E, U+0410..U+042F->U+0430..U+044F, U+0430..U+044F,\
U+05D0..U+05EA, U+0531..U+0556->U+0561..U+0586, U+0561..U+0587, U+0621..U+063A, U+01B9,\
U+01BF, U+0640..U+064A, U+0660..U+0669, U+066E, U+066F, U+0671..U+06D3, U+06F0..U+06FF,\
U+0904..U+0939, U+0958..U+095F, U+0960..U+0963, U+0966..U+096F, U+097B..U+097F,\
U+0985..U+09B9, U+09CE, U+09DC..U+09E3, U+09E6..U+09EF, U+0A05..U+0A39, U+0A59..U+0A5E,\
U+0A66..U+0A6F, U+0A85..U+0AB9, U+0AE0..U+0AE3, U+0AE6..U+0AEF, U+0B05..U+0B39,\
U+0B5C..U+0B61, U+0B66..U+0B6F, U+0B71, U+0B85..U+0BB9, U+0BE6..U+0BF2, U+0C05..U+0C39,\
U+0C66..U+0C6F, U+0C85..U+0CB9, U+0CDE..U+0CE3, U+0CE6..U+0CEF, U+0D05..U+0D39, U+0D60,\
U+0D61, U+0D66..U+0D6F, U+0D85..U+0DC6, U+1900..U+1938, U+1946..U+194F, U+A800..U+A805,\
U+A807..U+A822, U+0386->U+03B1, U+03AC->U+03B1, U+0388->U+03B5, U+03AD->U+03B5,\
U+0389->U+03B7, U+03AE->U+03B7, U+038A->U+03B9, U+0390->U+03B9, U+03AA->U+03B9,\
U+03AF->U+03B9, U+03CA->U+03B9, U+038C->U+03BF, U+03CC->U+03BF, U+038E->U+03C5,\
U+03AB->U+03C5, U+03B0->U+03C5, U+03CB->U+03C5, U+03CD->U+03C5, U+038F->U+03C9,\
U+03CE->U+03C9, U+03C2->U+03C3, U+0391..U+03A1->U+03B1..U+03C1,\
U+03A3..U+03A9->U+03C3..U+03C9, U+03B1..U+03C1, U+03C3..U+03C9, U+0E01..U+0E2E,\
U+0E30..U+0E3A, U+0E40..U+0E45, U+0E47, U+0E50..U+0E59, U+A000..U+A48F, U+4E00..U+9FBF,\
U+3400..U+4DBF, U+20000..U+2A6DF, U+F900..U+FAFF, U+2F800..U+2FA1F, U+2E80..U+2EFF,\
U+2F00..U+2FDF, U+3100..U+312F, U+31A0..U+31BF, U+3040..U+309F, U+30A0..U+30FF,\
U+31F0..U+31FF, U+AC00..U+D7AF, U+1100..U+11FF, U+3130..U+318F, U+A000..U+A48F,\
U+A490..U+A4CF
ngram_len=1
ngram_chars=U+4E00..U+9FBF, U+3400..U+4DBF, U+20000..U+2A6DF, U+F900..U+FAFF,\
U+2F800..U+2FA1F, U+2E80..U+2EFF, U+2F00..U+2FDF, U+3100..U+312F, U+31A0..U+31BF,\
U+3040..U+309F, U+30A0..U+30FF, U+31F0..U+31FF, U+AC00..U+D7AF, U+1100..U+11FF,\
U+3130..U+318F, U+A000..U+A48F, U+A490..U+A4CF
}

indexer{
 mem_limit=32M
}
searchd{
port=3312
log=/usr/local/sphinx/var/log/searchd.log
query_log=/usr/local/sphinx/var/log/query.log
read_timeout=5
max_children=30
pid_file=/usr/local/sphinx/var/log/searchd.pid
max_matches=1000
seamless_rotate=1
}

你可以参考一下，使用这个配置文件需要修改用户，密码保存目录等，来符合你自己mysql的要求。sphinx的官网的配置有一些问题，最关键的就是 morphology=none 这段在中文情况下不能使用，否则会导致无法启动searchd服务。

配置完成后，就可以进行索引：

/usr/local/sphinx/bin/indexer --config /usr/local/sphinx/etc/sphinx.conf --all

然后可以启动searchd

/usr/local/sphinx/bin/searchd --config /usr/local/sphinx/etc/sphinx.conf

我们来用php api进行搜索，将安装目录的api文件都 copy 到 网站的根目录下，最重要的是sphinxapi.php

新建一个test.php文件，代码如下：

<?php require 'sphinxapi.php';
$q=$_GET['q']; 
$mode=SPH_MATCH_ALL; 
$host='localhost'; 
$port=3312; 
$index='*'; 
$groupby=''; 
$groupsort='@group desc'; 
$filter='site_id'; 
$filtervals=array(); 
$distinct=''; 
$sortby=''; 
$limit=20; 
$opts=array(
	'before_match'=>'<b>',
	'after_match'=>'</b>',
	'chunk_separator'=>' ... ',
	'limit'=>60,
	'around'=>3
); 
$ranker=SPH_RANK_PROXIMITY_BM25;
$cl=new SphinxClient(); 
$cl->SetServer($host,$port); 
$cl->SetWeights(array(100,1)); 
$cl->SetMatchMode($mode); 
if(count($filtervals))$cl->SetFilter($filter,$filtervals); 
if($groupby)$cl->SetGroupBy($groupby,SPH_GROUPBY_ATTR,$groupsort); 
if($sortby)$cl->SetSortMode(SPH_SORT_EXTENDED,$sortby); 
if($sortexpr)$cl->SetSortMode(SPH_SORT_EXPR,$sortexpr); 
if($distinct)$cl->SetGroupDistinct($distinct); 
if($limit)$cl->SetLimits(0,$limit,($limit>1000)?$limit:1000); 
$cl->SetRankingMode($ranker); 
$cl->SetArrayResult(true); 
$res=$cl->Query($q,$index); 
?>

这是一个最简单的测试实例，注意保存的charset是 utf-8 ，无BOM，现在可以通过 http://www.phpernote.com/test.php 来测试，结果会返回一个数组，sphinx不会返回title和content等内容，因此要根据id在mysql检索以显示文章标题和正文。

目前 sphinx 生成的索引文件不能大于2G

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