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Home php教程 php手冊(cè) php利用scws實(shí)現(xiàn)mysql全文搜索功能的方法介紹

php利用scws實(shí)現(xiàn)mysql全文搜索功能的方法介紹

Mar 30, 2017 pm 04:04 PM
php

本文實(shí)例講述了php利用scws實(shí)現(xiàn)mysql全文搜索功能的方法。分享給大家供大家參考。具體方法如下:

scws這樣的中文分詞插件比較不錯(cuò),簡單的學(xué)習(xí)了一下,它包涵一些專有名稱、人名、地名、數(shù)字年代等規(guī)則集合,可以直接將語句按這些規(guī)則分開成一個(gè)一個(gè)關(guān)鍵詞,準(zhǔn)確率在90%-95%之間,按照安裝說明把scws的擴(kuò)展放入php的擴(kuò)展目錄里,下載規(guī)則文件和詞典文件,并在php配置文件引用它們,就可以用scws進(jìn)行分詞了.

1) 修改 php 擴(kuò)展代碼以兼容支持 php 5.4.x

2) 修正 php 擴(kuò)展中 scws_get_tops 的 limit 參數(shù)不允許少于 10 的問題

3) libscws 增加 scws_fork() 從既有的 scws 實(shí)例產(chǎn)生分支并共享詞典/規(guī)則集,主要用于多線程開發(fā).

4) 新增部分版本的 win32 的 dll 擴(kuò)展

PHP實(shí)例代碼如下:

<?php 
//實(shí)例化分詞插件核心類 
$so = scws_new(); 
//設(shè)置分詞時(shí)所用編碼 
$so->set_charset(&#39;utf-8&#39;); 
//設(shè)置分詞所用詞典(此處使用utf8的詞典) 
$so->set_dict(&#39;/path/dict.utf8.xdb&#39;); 
//設(shè)置分詞所用規(guī)則 
$so->set_rule(&#39;/path/rules.utf8.ini &#39;); 
//分詞前去掉標(biāo)點(diǎn)符號(hào) 
$so->set_ignore(true); 
//是否復(fù)式分割,如“中國人”返回“中國+人+中國人”三個(gè)詞。 
$so->set_multi(true); 
//設(shè)定將文字自動(dòng)以二字分詞法聚合 
$so->set_duality(true); 
//要進(jìn)行分詞的語句 
$so->send_text(“歡迎來到火星時(shí)代IT開發(fā)”); 
//獲取分詞結(jié)果,如果提取高頻詞用get_tops方法 
while ($tmp = $so->get_result()) 
{ 
  print_r($tmp); 
} 
$so->close(); 
?>


注:如以上例子,輸入的文字,詞典,規(guī)則文件這三者的字符集必須統(tǒng)一,另外mysql 4.XX有的是不支持中文全文搜索的,可以存入關(guān)鍵字對(duì)應(yīng)的區(qū)位碼以方便全文搜索.

版本列表

版本 類型 平臺(tái) 性能 其它

SCWS-1.1.x C 代碼 *Unix*/*PHP* 準(zhǔn)確: 95%, 召回: 91%, 速度: 1.2MB/sec

PHP擴(kuò)展分詞速度: 250KB/sec [下載] [文檔] [安裝說明]

php_scws.dll(1) PHP擴(kuò)展庫 Windows/PHP 4.4.x 準(zhǔn)確: 95%, 召回: 91%,

php_scws.dll(2) PHP擴(kuò)展庫 Windows/PHP 5.2.x 準(zhǔn)確: 95%, 召回: 91%,

php_scws.dll(3) PHP擴(kuò)展庫 Windows/PHP 5.3.x 準(zhǔn)確: 95%, 召回: 91%,?

php_scws.dll(4) PHP擴(kuò)展庫 Windows/PHP 5.4.x 準(zhǔn)確: 95%, 召回: 91%,

PSCWS23 PHP源代碼 不限 (不支持UTF-8) 準(zhǔn)確: 93%, 召回: 89%,

PSCWS4 PHP源代碼 不限 準(zhǔn)確: 95%, 召回: 91%,

?以上就是php利用scws實(shí)現(xiàn)mysql全文搜索功能的方法,的內(nèi)容,更多相關(guān)內(nèi)容請(qǐng)關(guān)注PHP中文網(wǎng)(ipnx.cn)!

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