手把手教你做关键词匹配项目（搜索引擎）---- 第二十二天，教你做第二十二天

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吐槽：今天也是刚把心态调整好，继续写以前没有完成的文章，最近几个月自己也是休整了一段时间，回家做苦力，也当作是锻炼锻炼自己的身体，毕竟任何东西都换不回你的健康，我也是建议做IT行业的帅哥们多活动活动你们其它的部位。

第二十二天

起点：手把手教你做关键词匹配项目（搜索引擎）---- 第一天

回顾：手把手教你做关键词匹配项目（搜索引擎）---- 第二十一天

小帅帅是乐于做总结的人，根据以前所学的知识他总结了如下：

1. 宝贝属性的扩展和类型的问题初步已经得到很好的控制了，不过要推广和运营维护还是遇到了很大的障碍。

2. 对关键词的拆分使用了scws扩展以及自己原生的业务拆词方案，拆词有效的解决了词组方面的匹配难度。

3. 所有的初始工作好像已经完成了，只需要最后的整理项目应该可以正式运行起来了。

小帅帅的主动意识比较强烈，他没有去问于老大，就自己动手写了份代码，该代码主要是为了把所有的步骤连接起来。

宝贝属性的扩展CharList的构建请参照：手把手教你做关键词匹配项目（搜索引擎）---- 第十二天 ~ 手把手教你做关键词匹配项目（搜索引擎）---- 第十八天

Selector主要步骤如下：

1. 获取宝贝属性。

2. 使用业务知识扩充宝贝属性，形成CharList

3. 从词库中获取关键词

4. 关键词拆分算法

5. 匹配度算法

6. 返回匹配上的关键词列表

代码如下：

<span> 1</span> <?<span>php
</span><span> 2</span> <span>#</span><span>@Filename:selector/Selector.php</span>
<span> 3</span> <span>#</span><span>@Author:oshine</span>
<span> 4</span> 
<span> 5</span> <span>require_once</span> <span>dirname</span>(<span>__FILE__</span>) . '/SelectorItem.php'<span>;
</span><span> 6</span> <span>require_once</span> <span>dirname</span>(<span>__FILE__</span>) . '/charlist/CharList.php'<span>;
</span><span> 7</span> <span>require_once</span> <span>dirname</span>(<span>__FILE__</span>) . '/charlist/CharlistHandle.php'<span>;
</span><span> 8</span> <span>require_once</span> <span>dirname</span>(<span>dirname</span>(<span>__FILE__</span>)) . '/lib/Logger.php'<span>;
</span><span> 9</span> 
<span>10</span> <span>class</span><span> Selector
</span><span>11</span> <span>{
</span><span>12</span> 
<span>13</span>     <span>private</span> <span>static</span> <span>$charListHandle</span> = <span>array</span><span>(
</span><span>14</span>         "黑名单" => "BacklistCharListHandle",
<span>15</span>         "近义词" => "LinklistCharListHandle"
<span>16</span> <span>    );
</span><span>17</span> 
<span>18</span>     <span>public</span> <span>static</span> <span>function</span> select(<span>$num_iid</span><span>)
</span><span>19</span> <span>    {
</span><span>20</span>         <span>$selectorItem</span> = SelectorItem::createFromApi(<span>$num_iid</span><span>);
</span><span>21</span> 
<span>22</span>         Logger::trace(<span>$selectorItem</span>-><span>props_name);
</span><span>23</span> 
<span>24</span>         <span>$charlist</span> = <span>new</span><span> CharList();
</span><span>25</span> 
<span>26</span>         <span>foreach</span> (self::<span>$charListHandle</span> <span>as</span> <span>$matchKey</span> => <span>$className</span><span>) {
</span><span>27</span> 
<span>28</span>             <span>$handle</span> = self::createCharListHandle(<span>$className</span>, <span>$charlist</span>, <span>$selectorItem</span><span>);
</span><span>29</span>             <span>$handle</span>-><span>exec</span><span>();
</span><span>30</span> 
<span>31</span> <span>        }
</span><span>32</span> 
<span>33</span>         <span>$selectWords</span> = <span>array</span><span>();
</span><span>34</span> 
<span>35</span>         <span>$keywords</span> = DB::makeArray("select word from keywords"<span>);
</span><span>36</span>         <span>foreach</span> (<span>$keywords</span> <span>as</span> <span>$val</span><span>) {
</span><span>37</span>             <span>#</span><span> code...</span>
<span>38</span>             <span>$keywordEntity</span> = SplitterApp::<span>split</span>(<span>$val</span>["word"<span>]);
</span><span>39</span>             
<span>40</span>                 <span>#</span><span> code...</span>
<span>41</span>             <span>if</span>(MacthExector::macth(<span>$keywordEntity</span>,<span>$charlist</span><span>)){
</span><span>42</span>                 <span>$selectWords</span>[] = <span>$val</span>["word"<span>];
</span><span>43</span> <span>            }           
</span><span>44</span> 
<span>45</span> <span>        }
</span><span>46</span> 
<span>47</span>         <span>return</span> <span>$selectWords</span><span>;
</span><span>48</span> <span>    }
</span><span>49</span> 
<span>50</span>     <span>public</span> <span>static</span> <span>function</span> createCharListHandle(<span>$className</span>, <span>$charlist</span>, <span>$selectorItem</span><span>)
</span><span>51</span> <span>    {
</span><span>52</span>         <span>if</span> (<span>class_exists</span>(<span>$className</span><span>)) {
</span><span>53</span>             <span>return</span> <span>new</span> <span>$className</span>(<span>$charlist</span>, <span>$selectorItem</span><span>);
</span><span>54</span> <span>        }
</span><span>55</span>         <span>throw</span> <span>new</span> <span>Exception</span>("class not exists", 0<span>);
</span><span>56</span> <span>    }
</span><span>57</span> }

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测试驱动代码编程请参照：

也是使用一样的原理，先把测试代码写好,后续补全MatchExector代码。

MatchExector主要功能计算匹配度。

1. 如果只要有一个词在黑名单里面，匹配度肯定为零。

2. 如果是核心词，那么根据以前提到的算法来计算，请参照：手把手教你做关键词匹配项目（搜索引擎）---- 第十九天

<span> 1</span> <?<span>php
</span><span> 2</span> <span>#</span><span>@Filename:mathes/MatchExector.php</span>
<span> 3</span> <span>#</span><span>@Author:oshine</span>
<span> 4</span> 
<span> 5</span> <span>class</span><span> MatchExector {
</span><span> 6</span> 
<span> 7</span>     <span>public</span> <span>static</span> <span>function</span> match(KeywordEntity <span>$keywordEntity</span>,CharList <span>$charlist</span><span>){
</span><span> 8</span> 
<span> 9</span>         <span>$matchingDegree</span> = 0<span>;
</span><span>10</span>         <span>$elementWords</span> = <span>$keywordEntity</span>-><span>getElementWords();
</span><span>11</span>         <span>foreach</span> (<span>$elementWords</span> <span>as</span> <span>$word</span><span>) {
</span><span>12</span>             <span>#</span><span> code...</span>
<span>13</span>             <span>if</span>(<span>in_array</span>(<span>$word</span>, <span>$charlist</span>-><span>getBlacklist()))
</span><span>14</span>                 <span>return</span> <span>false</span><span>;
</span><span>15</span>             <span>if</span>(<span>in_array</span>(<span>$word</span>, <span>$charlist</span>-><span>getCore()))
</span><span>16</span>                 <span>$matchingDegree</span>+=<span>$keywordEntity</span>->calculateWeight(<span>$word</span><span>);
</span><span>17</span> 
<span>18</span> <span>        }
</span><span>19</span> 
<span>20</span>         <span>if</span>(<span>$matchingDegree</span>>0.8<span>)
</span><span>21</span>             <span>return</span> <span>true</span><span>;
</span><span>22</span>         <span>return</span> <span>false</span><span>;
</span><span>23</span> 
<span>24</span> <span>    }
</span><span>25</span>     
<span>26</span> }

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整个代码相对来说实现了该有的功能，小帅帅非常的高兴，因为项目完成了肯定少不了项目奖金，说不定还有一餐丰富的晚餐，

想想都开始流口水了。

小帅帅把代码交给于老大，满怀期待的等候于老大的最后肯定。

于老大看了之后会有哪些反应呢？请关注第三章：关键词匹配项目深入研究（一）

第二章已完结，源代码地址：手把手教你做关键词匹配项目（二章完结篇）