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HomeBackend DevelopmentPHP Tutorial基本词匹配项目深入研究-过滤器的引入

关键词匹配项目深入研究-过滤器的引入

关键词匹配项目深入研究(一) - 过滤器的引入

在开始看本篇时,请先了解 手把手教你做关键词匹配项目(搜索引擎)---- 第一天 ~ 手把手教你做关键词匹配项目(搜索引擎)---- 第二十二天

前言

     接上回说到,小帅帅把完成后的代码,以及测试结果给出来后,于老大也没多说什么,就被要求上线了,原因很简单:大家都想有点贡献,福利也是少不了的,后期遇到的事情后期再来升级,那餐饭,小帅帅很happy,很满足,当然同行的有小丁丁,于老大,王总监。

问题的前因

       随着项目的运行,采集关键词的应用日益广泛,突然有一天小丁丁跑来找到小帅帅,小帅帅当然很欢喜,但是听到后面的对话凉了一大截。

      “小帅帅,你看,这些词怎么有&,?,%,好多乱七八糟的词都有了,这些词都不太合适用,帮帮忙看看怎么去掉咯。”小丁丁的眼神也够厉害的,盯得小帅帅直哆嗦。

      “大姐,好咯,我先去瞧瞧,这件事包在我身上,到时解决了跟你说声”。

       小帅帅回去查了下,发现数据库里面好多这种古怪的词,小帅帅慌了,只好又去找到于老大。

       “现在词库关键词里面包含&,?,%这种词很多,而且根据匹配度算法来算的话,这些词都是可用的,我们怎么办?”。

       于老大听了小帅帅的解说,想出了一个方案,我们控制下这些关键词咯,反正这些关键词业务也不使用,我们就不要让他入库了,既可以减少关键词库的量,又能保证关键词的可利用率高。

        小帅帅一听,于老大就是不一样,望尘莫及。

解决方案

         增加一个功能,控制词源入库,符合规则的准入,不符合规则的丢弃--过滤器的功能。

设计方案

   image

    升级版果断多姿多彩。

    类图:

    image

  

代码方案

      1. InputSource、FileSource、TaobaoHotsSource代码不变。

      2. Source代码新增过滤代码,如下:

<span style="color: #008080;"> 1</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> Source {</span><span style="color: #008080;"> 2</span> <span style="color: #008080;"> 3</span>     <span style="color: #0000ff;">public</span> <span style="color: #800080;">$keywords</span><span style="color: #000000;">;</span><span style="color: #008080;"> 4</span> <span style="color: #008080;"> 5</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> run() {</span><span style="color: #008080;"> 6</span> <span style="color: #008080;"> 7</span>         <span style="color: #0000ff;">foreach</span> (<span style="color: #800080;">$this</span>->keywords <span style="color: #0000ff;">as</span> <span style="color: #800080;">$word</span><span style="color: #000000;">) {</span><span style="color: #008080;"> 8</span>             <span style="color: #008000;">#</span><span style="color: #008000;"> code...</span><span style="color: #008080;"> 9</span>             <span style="color: #0000ff;">if</span>(Filter::is(<span style="color: #800080;">$word</span>)) <span style="color: #0000ff;">continue</span><span style="color: #000000;">;</span><span style="color: #008080;">10</span>             <span style="color: #008080;">11</span>             <span style="color: #800080;">$keyword</span> = <span style="color: #0000ff;">new</span><span style="color: #000000;"> Keyword();</span><span style="color: #008080;">12</span>             <span style="color: #800080;">$keyword</span>->word = <span style="color: #800080;">$word</span><span style="color: #000000;">;</span><span style="color: #008080;">13</span>             <span style="color: #800080;">$keyword</span>-><span style="color: #000000;">save();</span><span style="color: #008080;">14</span> <span style="color: #000000;">        }</span><span style="color: #008080;">15</span> <span style="color: #000000;">    }</span><span style="color: #008080;">16</span> <span style="color: #008080;">17</span> }

 

      3. 新增Filter代码:

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php</span><span style="color: #008080;"> 2</span> <span style="color: #008080;"> 3</span> <span style="color: #008000;">#</span><span style="color: #008000;">@Filename: filter/Filter.php</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">#</span><span style="color: #008000;">@Author: oShine</span><span style="color: #008080;"> 5</span> <span style="color: #008080;"> 6</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> Filter {</span><span style="color: #008080;"> 7</span> <span style="color: #008080;"> 8</span>     <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #800080;">$filterWords</span> = <span style="color: #0000ff;">array</span>("*","?","%",".","&"<span style="color: #000000;">);</span><span style="color: #008080;"> 9</span> <span style="color: #008080;">10</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span> is(<span style="color: #800080;">$word</span><span style="color: #000000;">){</span><span style="color: #008080;">11</span>         <span style="color: #800080;">$pattern</span> = "/(".<span style="color: #008080;">implode</span>("|", self::<span style="color: #800080;">$filterWords</span>).")/"<span style="color: #000000;">;</span><span style="color: #008080;">12</span>         <span style="color: #0000ff;">return</span> <span style="color: #008080;">preg_match</span>(pattern, <span style="color: #800080;">$word</span><span style="color: #000000;">);</span><span style="color: #008080;">13</span> <span style="color: #000000;">    }</span><span style="color: #008080;">14</span> <span style="color: #008080;">15</span> }

       

总结

     良好的代码结构,新增移除功能都非常简单,工作效率提升了。小帅帅深深的爱上了这份工作。

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