使用sphinx创建搜索引擎

建立数据库索引表

从最简单的索引开始建立好了(此处省去了sphinx的安装过程)。

<code class="language-sql hljs  has-numbering"><span class="hljs-comment">-- 建立索引表</span>
<span class="hljs-operator"><span class="hljs-keyword">create</span> <span class="hljs-keyword">table</span> sphinx_searchs( id <span class="hljs-keyword">int</span>(<span class="hljs-number">10</span>) unsigned auto_increment, <span class="hljs-keyword">key</span> <span class="hljs-keyword">varchar</span>(<span class="hljs-number">20</span>) <span class="hljs-keyword">not</span> <span class="hljs-keyword">null</span>, <span class="hljs-keyword">primary</span> <span class="hljs-keyword">key</span> id) enginer=innodb;</span></code><ul style="" class="pre-numbering"><li>1</li><li>2</li></ul>

进行sphinx设置

<code class="hljs avrasm has-numbering"><span class="hljs-preprocessor"># 全局设置</span>
source src1 {
    type = mysql
    sql_host = <span class="hljs-number">192.</span><span class="hljs-built_in">x</span><span class="hljs-preprocessor">.x</span><span class="hljs-preprocessor">.x</span>
    sql_user = xxxxxx
    sql_pass = xxxxxx
    sql_db   = search
    sql_port = <span class="hljs-number">3306</span>
    sql_query_pre = <span class="hljs-keyword">SET</span> NAMES utf8
}

<span class="hljs-preprocessor"># 继承数据库设置</span>
source product : src1 {
    sql_query = SELECT `id`,`key` FROM sphinx_searchs
}

<span class="hljs-preprocessor"># 索引文件设置</span>
index product {
    source = product
    path   = /webroot/database/sphinx/product

    docinfo = extern
    dict = keywords
    mlock = <span class="hljs-number">0</span>
    morphology = none
    min_word_len = <span class="hljs-number">1</span>
    charset_table = U+FF10.<span class="hljs-preprocessor">.U</span>+FF19-><span class="hljs-number">0.</span><span class="hljs-number">.9</span>, <span class="hljs-number">0.</span><span class="hljs-number">.9</span>, U+FF41.<span class="hljs-preprocessor">.U</span>+FF5A->a.<span class="hljs-preprocessor">.z</span>, U+FF21.<span class="hljs-preprocessor">.U</span>+FF3A->a.<span class="hljs-preprocessor">.z</span>,A.<span class="hljs-preprocessor">.Z</span>->a.<span class="hljs-preprocessor">.z</span>, a.<span class="hljs-preprocessor">.z</span>, U+<span class="hljs-number">0149</span>, U+<span class="hljs-number">017</span>F, U+<span class="hljs-number">0138</span>, U+<span class="hljs-number">00</span>DF, U+<span class="hljs-number">00</span>FF, U+<span class="hljs-number">00</span>C0.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">00</span>D6->U+<span class="hljs-number">00E0</span>.<span class="hljs-preprocessor">.U</span>+<span 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    ngram_chars = U+<span class="hljs-number">4E00</span>.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">9</span>FBF, U+<span class="hljs-number">3400.</span><span class="hljs-preprocessor">.U</span>+<span class="hljs-number">4</span>DBF, U+<span class="hljs-number">20000.</span><span class="hljs-preprocessor">.U</span>+<span class="hljs-number">2</span>A6DF, U+F900.<span class="hljs-preprocessor">.U</span>+FAFF,U+<span class="hljs-number">2</span>F800.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">2</span>FA1F, U+<span class="hljs-number">2E80</span>.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">2</span>EFF, U+<span class="hljs-number">2</span>F00.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">2</span>FDF, U+<span class="hljs-number">3100.</span><span class="hljs-preprocessor">.U</span>+<span class="hljs-number">312</span>F, U+<span class="hljs-number">31</span>A0.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">31</span>BF,U+<span class="hljs-number">3040.</span><span class="hljs-preprocessor">.U</span>+<span class="hljs-number">309</span>F, U+<span class="hljs-number">30</span>A0.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">30</span>FF,U+<span class="hljs-number">31</span>F0.<span class="hljs-preprocessor">.U</span>+<span class="hljs-number">31</span>FF, U+AC00.<span class="hljs-preprocessor">.U</span>+D7AF, U+<span class="hljs-number">1100.</span><span class="hljs-preprocessor">.U</span>+<span class="hljs-number">11</span>FF,U+<span class="hljs-number">3130.</span><span class="hljs-preprocessor">.U</span>+<span class="hljs-number">318</span>F, U+A000.<span class="hljs-preprocessor">.U</span>+A48F, U+A490.<span class="hljs-preprocessor">.U</span>+A4CF
    html_strip = <span class="hljs-number">1</span>
    min_prefix_len = <span class="hljs-number">0</span>
    min_infix_len = <span class="hljs-number">1</span>
    ngram_len = <span class="hljs-number">1</span>
}</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li></ul>

下面对以上的设置进行说明。

sphinx设置简要属性说明

source product : src1数据源设置

创建一个数据源，他的信息继承自 src1，继承和程序类的继承一样，子对象可以对父对象的值进行覆盖。使用继承可以省略我们编写重复的设置信息。

index product索引的设置：

• source：指向数据源（这里我们指向source product : src1）；
• path：索引文件存放的目录；
• charset_table：接受的字符表和大小写转换规则，更多的信息可以参考官方文档，以上我们已经设置为亚洲语言编码区域，可以直接复制使用；
• ngram_chars：同上，不多做解释；
• min_word_len：非英文词组最小字符数（也就是单个汉字）
• html_strip：过滤HTML元素

生成索引文件并启动服务

<code class="language-shell hljs brainfuck has-numbering"><span class="hljs-comment">/opt/sphinx/bin/indexer</span> <span class="hljs-literal">-</span><span class="hljs-literal">-</span><span class="hljs-comment">config</span> <span class="hljs-comment">/opt/sphinx/config</span><span class="hljs-string">.</span><span class="hljs-comment">conf</span> <span class="hljs-literal">-</span><span class="hljs-literal">-</span><span class="hljs-comment">all</span>
<span class="hljs-comment">/opt/sphinx/bin/searchd</span> <span class="hljs-literal">-</span><span class="hljs-literal">-</span><span class="hljs-comment">config</span> <span class="hljs-comment">/opt/sphinx/config</span><span class="hljs-string">.</span><span class="hljs-comment">conf</span></code><ul style="" class="pre-numbering"><li>1</li><li>2</li></ul>

编写搜索代码

进行搜索

<code class="language-php hljs  has-numbering"><span class="hljs-preprocessor"><?php</span>
<span class="hljs-variable">$sphinx</span> = <span class="hljs-keyword">new</span> SphinxClient;
<span class="hljs-variable">$sphinx</span>->setServer(<span class="hljs-string">'127.0.0.1'</span>,<span class="hljs-number">9312</span>);
<span class="hljs-variable">$result</span> = <span class="hljs-variable">$sphinx</span>->query(<span class="hljs-string">'树脂摆饰'</span>,<span class="hljs-string">'product'</span>);</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul>

到此，无需太多的设置，暂时抛弃复杂，繁琐的过滤功能，简简单单的实现了索引引擎核心功能——标题检索。

除此，大家可以试试var_dump($result)以下方式检索之间，结果有什么区别?

$result = $sphinx->query('*树脂摆饰','product');
$result = $sphinx->query('树脂摆饰*','product');
$result = $sphinx->query('*树脂摆饰*','product');