PHP similar_text()、levenshtein()、lcs()支持中文汉字版，

首页

后端开发

php教程

PHP similar_text()、levenshtein()、lcs()支持中文汉字版，_PHP教程

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jul 13, 2016 am 10:16 AM

phptext中文支持汉字版

PHP similar_text()、levenshtein()、lcs()支持中文汉字版，

PHP 原生的similar_text()函数、levenshtein()函数对中文汉字支持不好，我自己写了一个

similar_text()中文汉字版

<span> 1</span>     <?<span>php  
</span><span> 2</span>     <span>//</span><span>拆分字符串  </span>
<span> 3</span>     <span>function</span> split_str(<span>$str</span><span>) {  
</span><span> 4</span>       <span>preg_match_all</span>("/./u", <span>$str</span>, <span>$arr</span><span>);  
</span><span> 5</span>       <span>return</span> <span>$arr</span>[0<span>];  
</span><span> 6</span> <span>    }  
</span><span> 7</span>       
<span> 8</span>     <span>//</span><span>相似度检测  </span>
<span> 9</span>     <span>function</span> similar_text_cn(<span>$str1</span>, <span>$str2</span><span>) {  
</span><span>10</span>       <span>$arr_1</span> = <span>array_unique</span>(split_str(<span>$str1</span><span>));  
</span><span>11</span>       <span>$arr_2</span> = <span>array_unique</span>(split_str(<span>$str2</span><span>));  
</span><span>12</span>       <span>$similarity</span> = <span>count</span>(<span>$arr_2</span>) - <span>count</span>(<span>array_diff</span>(<span>$arr_2</span>, <span>$arr_1</span><span>));  
</span><span>13</span>         
<span>14</span>       <span>return</span> <span>$similarity</span><span>;  
</span><span>15</span>     }

levenshtein()中文汉字版

<span> 1</span>     <?<span>php  
</span><span> 2</span>     <span>//</span><span>拆分字符串  </span>
<span> 3</span>     <span>function</span> mbStringToArray(<span>$string</span>, <span>$encoding</span> = 'UTF-8'<span>) {  
</span><span> 4</span>         <span>$arrayResult</span> = <span>array</span><span>();  
</span><span> 5</span>       
<span> 6</span>         <span>while</span> (<span>$iLen</span> = mb_strlen(<span>$string</span>, <span>$encoding</span><span>)) {  
</span><span> 7</span>             <span>array_push</span>(<span>$arrayResult</span>, mb_substr(<span>$string</span>, 0, 1, <span>$encoding</span><span>));  
</span><span> 8</span>             <span>$string</span> = mb_substr(<span>$string</span>, 1, <span>$iLen</span>, <span>$encoding</span><span>);  
</span><span> 9</span> <span>        }  
</span><span>10</span>       
<span>11</span>         <span>return</span> <span>$arrayResult</span><span>;  
</span><span>12</span> <span>    }  
</span><span>13</span>       
<span>14</span>     <span>//</span><span>编辑距离  </span>
<span>15</span>     <span>function</span> levenshtein_cn(<span>$str1</span>, <span>$str2</span>, <span>$costReplace</span> = 1, <span>$encoding</span> = 'UTF-8'<span>) {  
</span><span>16</span>         <span>$count_same_letter</span> = 0<span>;  
</span><span>17</span>         <span>$d</span> = <span>array</span><span>();  
</span><span>18</span>       
<span>19</span>         <span>$mb_len1</span> = mb_strlen(<span>$str1</span>, <span>$encoding</span><span>);  
</span><span>20</span>         <span>$mb_len2</span> = mb_strlen(<span>$str2</span>, <span>$encoding</span><span>);  
</span><span>21</span>       
<span>22</span>         <span>$mb_str1</span> = mbStringToArray(<span>$str1</span>, <span>$encoding</span><span>);  
</span><span>23</span>         <span>$mb_str2</span> = mbStringToArray(<span>$str2</span>, <span>$encoding</span><span>);  
</span><span>24</span>       
<span>25</span>         <span>for</span> (<span>$i1</span> = 0; <span>$i1</span> <= <span>$mb_len1</span>; <span>$i1</span>++<span>) {  
</span><span>26</span>             <span>$d</span>[<span>$i1</span>] = <span>array</span><span>();  
</span><span>27</span>             <span>$d</span>[<span>$i1</span>][0] = <span>$i1</span><span>;  
</span><span>28</span> <span>        }  
</span><span>29</span>       
<span>30</span>         <span>for</span> (<span>$i2</span> = 0; <span>$i2</span> <= <span>$mb_len2</span>; <span>$i2</span>++<span>) {  
</span><span>31</span>             <span>$d</span>[0][<span>$i2</span>] = <span>$i2</span><span>;  
</span><span>32</span> <span>        }  
</span><span>33</span>       
<span>34</span>         <span>for</span> (<span>$i1</span> = 1; <span>$i1</span> <= <span>$mb_len1</span>; <span>$i1</span>++<span>) {  
</span><span>35</span>             <span>for</span> (<span>$i2</span> = 1; <span>$i2</span> <= <span>$mb_len2</span>; <span>$i2</span>++<span>) {  
</span><span>36</span>                 <span>//</span><span> $cost = ($str1[$i1 - 1] == $str2[$i2 - 1]) ? 0 : 1;  </span>
<span>37</span>                 <span>if</span> (<span>$mb_str1</span>[<span>$i1</span> - 1] === <span>$mb_str2</span>[<span>$i2</span> - 1<span>]) {  
</span><span>38</span>                     <span>$cost</span> = 0<span>;  
</span><span>39</span>                     <span>$count_same_letter</span>++<span>;  
</span><span>40</span>                 } <span>else</span><span> {  
</span><span>41</span>                     <span>$cost</span> = <span>$costReplace</span>; <span>//</span><span>替换  </span>
<span>42</span> <span>                }  
</span><span>43</span>       
<span>44</span>                 <span>$d</span>[<span>$i1</span>][<span>$i2</span>] = <span>min</span>(<span>$d</span>[<span>$i1</span> - 1][<span>$i2</span>] + 1, <span>//</span><span>插入  </span>
<span>45</span>                 <span>$d</span>[<span>$i1</span>][<span>$i2</span> - 1] + 1, <span>//</span><span>删除  </span>
<span>46</span>                 <span>$d</span>[<span>$i1</span> - 1][<span>$i2</span> - 1] + <span>$cost</span><span>);  
</span><span>47</span> <span>            }  
</span><span>48</span> <span>        }  
</span><span>49</span>       
<span>50</span>         <span>return</span> <span>$d</span>[<span>$mb_len1</span>][<span>$mb_len2</span><span>];  
</span><span>51</span>         <span>//</span><span>return array('distance' => $d[$mb_len1][$mb_len2], 'count_same_letter' => $count_same_letter);  </span>
<span>52</span>     }

最长公共子序列LCS()

<span> 1</span>         <?<span>php  
</span><span> 2</span>         <span>//</span><span>最长公共子序列英文版  </span>
<span> 3</span>         <span>function</span> LCS_en(<span>$str_1</span>, <span>$str_2</span><span>) {  
</span><span> 4</span>           <span>$len_1</span> = <span>strlen</span>(<span>$str_1</span><span>);  
</span><span> 5</span>           <span>$len_2</span> = <span>strlen</span>(<span>$str_2</span><span>);  
</span><span> 6</span>           <span>$len</span> = <span>$len_1</span> > <span>$len_2</span> ? <span>$len_1</span> : <span>$len_2</span><span>;  
</span><span> 7</span>           
<span> 8</span>           <span>$dp</span> = <span>array</span><span>();  
</span><span> 9</span>           <span>for</span> (<span>$i</span> = 0; <span>$i</span> <= <span>$len</span>; <span>$i</span>++<span>) {  
</span><span>10</span>             <span>$dp</span>[<span>$i</span>] = <span>array</span><span>();  
</span><span>11</span>             <span>$dp</span>[<span>$i</span>][0] = 0<span>;  
</span><span>12</span>             <span>$dp</span>[0][<span>$i</span>] = 0<span>;  
</span><span>13</span> <span>          }  
</span><span>14</span>           
<span>15</span>           <span>for</span> (<span>$i</span> = 1; <span>$i</span> <= <span>$len_1</span>; <span>$i</span>++<span>) {  
</span><span>16</span>             <span>for</span> (<span>$j</span> = 1; <span>$j</span> <= <span>$len_2</span>; <span>$j</span>++<span>) {  
</span><span>17</span>               <span>if</span> (<span>$str_1</span>[<span>$i</span> - 1] == <span>$str_2</span>[<span>$j</span> - 1<span>]) {  
</span><span>18</span>                 <span>$dp</span>[<span>$i</span>][<span>$j</span>] = <span>$dp</span>[<span>$i</span> - 1][<span>$j</span> - 1] + 1<span>;  
</span><span>19</span>               } <span>else</span><span> {  
</span><span>20</span>                 <span>$dp</span>[<span>$i</span>][<span>$j</span>] = <span>$dp</span>[<span>$i</span> - 1][<span>$j</span>] > <span>$dp</span>[<span>$i</span>][<span>$j</span> - 1] ? <span>$dp</span>[<span>$i</span> - 1][<span>$j</span>] : <span>$dp</span>[<span>$i</span>][<span>$j</span> - 1<span>];  
</span><span>21</span> <span>              }  
</span><span>22</span> <span>            }  
</span><span>23</span> <span>          }  
</span><span>24</span>           
<span>25</span>           <span>return</span> <span>$dp</span>[<span>$len_1</span>][<span>$len_2</span><span>];  
</span><span>26</span> <span>        }  
</span><span>27</span>           
<span>28</span>         <span>//</span><span>拆分字符串  </span>
<span>29</span>         <span>function</span> mbStringToArray(<span>$string</span>, <span>$encoding</span> = 'UTF-8'<span>) {  
</span><span>30</span>           <span>$arrayResult</span> = <span>array</span><span>();  
</span><span>31</span>           
<span>32</span>           <span>while</span> (<span>$iLen</span> = mb_strlen(<span>$string</span>, <span>$encoding</span><span>)) {  
</span><span>33</span>             <span>array_push</span>(<span>$arrayResult</span>, mb_substr(<span>$string</span>, 0, 1, <span>$encoding</span><span>));  
</span><span>34</span>             <span>$string</span> = mb_substr(<span>$string</span>, 1, <span>$iLen</span>, <span>$encoding</span><span>);  
</span><span>35</span> <span>          }  
</span><span>36</span>           
<span>37</span>           <span>return</span> <span>$arrayResult</span><span>;  
</span><span>38</span> <span>        }  
</span><span>39</span>           
<span>40</span>         <span>//</span><span>最长公共子序列中文版  </span>
<span>41</span>         <span>function</span> LCS_cn(<span>$str1</span>, <span>$str2</span>, <span>$encoding</span> = 'UTF-8'<span>) {  
</span><span>42</span>           <span>$mb_len1</span> = mb_strlen(<span>$str1</span>, <span>$encoding</span><span>);  
</span><span>43</span>           <span>$mb_len2</span> = mb_strlen(<span>$str2</span>, <span>$encoding</span><span>);  
</span><span>44</span>           
<span>45</span>           <span>$mb_str1</span> = mbStringToArray(<span>$str1</span>, <span>$encoding</span><span>);  
</span><span>46</span>           <span>$mb_str2</span> = mbStringToArray(<span>$str2</span>, <span>$encoding</span><span>);  
</span><span>47</span>           
<span>48</span>           <span>$len</span> = <span>$mb_len1</span> > <span>$mb_len2</span> ? <span>$mb_len1</span> : <span>$mb_len2</span><span>;  
</span><span>49</span>           
<span>50</span>           <span>$dp</span> = <span>array</span><span>();  
</span><span>51</span>           <span>for</span> (<span>$i</span> = 0; <span>$i</span> <= <span>$len</span>; <span>$i</span>++<span>) {  
</span><span>52</span>             <span>$dp</span>[<span>$i</span>] = <span>array</span><span>();  
</span><span>53</span>             <span>$dp</span>[<span>$i</span>][0] = 0<span>;  
</span><span>54</span>             <span>$dp</span>[0][<span>$i</span>] = 0<span>;  
</span><span>55</span> <span>          }  
</span><span>56</span>           
<span>57</span>           <span>for</span> (<span>$i</span> = 1; <span>$i</span> <= <span>$mb_len1</span>; <span>$i</span>++<span>) {  
</span><span>58</span>             <span>for</span> (<span>$j</span> = 1; <span>$j</span> <= <span>$mb_len2</span>; <span>$j</span>++<span>) {  
</span><span>59</span>               <span>if</span> (<span>$mb_str1</span>[<span>$i</span> - 1] == <span>$mb_str2</span>[<span>$j</span> - 1<span>]) {  
</span><span>60</span>                 <span>$dp</span>[<span>$i</span>][<span>$j</span>] = <span>$dp</span>[<span>$i</span> - 1][<span>$j</span> - 1] + 1<span>;  
</span><span>61</span>               } <span>else</span><span> {  
</span><span>62</span>                 <span>$dp</span>[<span>$i</span>][<span>$j</span>] = <span>$dp</span>[<span>$i</span> - 1][<span>$j</span>] > <span>$dp</span>[<span>$i</span>][<span>$j</span> - 1] ? <span>$dp</span>[<span>$i</span> - 1][<span>$j</span>] : <span>$dp</span>[<span>$i</span>][<span>$j</span> - 1<span>];  
</span><span>63</span> <span>              }  
</span><span>64</span> <span>            }  
</span><span>65</span> <span>          }  
</span><span>66</span>           
<span>67</span>           <span>return</span> <span>$dp</span>[<span>$mb_len1</span>][<span>$mb_len2</span><span>];  
</span><span>68</span>         }

声明

本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn

继续使用PHP：耐力的原因Apr 19, 2025 am 12:23 AM

PHP仍然流行的原因是其易用性、灵活性和强大的生态系统。1)易用性和简单语法使其成为初学者的首选。2)与web开发紧密结合，处理HTTP请求和数据库交互出色。3)庞大的生态系统提供了丰富的工具和库。4)活跃的社区和开源性质使其适应新需求和技术趋势。

PHP和Python：探索他们的相似性和差异Apr 19, 2025 am 12:21 AM

PHP和Python都是高层次的编程语言，广泛应用于Web开发、数据处理和自动化任务。1.PHP常用于构建动态网站和内容管理系统，而Python常用于构建Web框架和数据科学。2.PHP使用echo输出内容，Python使用print。3.两者都支持面向对象编程，但语法和关键字不同。4.PHP支持弱类型转换，Python则更严格。5.PHP性能优化包括使用OPcache和异步编程，Python则使用cProfile和异步编程。

PHP和Python：解释了不同的范例Apr 18, 2025 am 12:26 AM

PHP主要是过程式编程，但也支持面向对象编程（OOP）；Python支持多种范式，包括OOP、函数式和过程式编程。PHP适合web开发，Python适用于多种应用，如数据分析和机器学习。

PHP和Python：深入了解他们的历史Apr 18, 2025 am 12:25 AM

PHP起源于1994年，由RasmusLerdorf开发，最初用于跟踪网站访问者，逐渐演变为服务器端脚本语言，广泛应用于网页开发。Python由GuidovanRossum于1980年代末开发，1991年首次发布，强调代码可读性和简洁性，适用于科学计算、数据分析等领域。

在PHP和Python之间进行选择：指南Apr 18, 2025 am 12:24 AM

PHP适合网页开发和快速原型开发，Python适用于数据科学和机器学习。1.PHP用于动态网页开发，语法简单，适合快速开发。2.Python语法简洁，适用于多领域，库生态系统强大。

PHP和框架：现代化语言Apr 18, 2025 am 12:14 AM

PHP在现代化进程中仍然重要，因为它支持大量网站和应用，并通过框架适应开发需求。1.PHP7提升了性能并引入了新功能。2.现代框架如Laravel、Symfony和CodeIgniter简化开发，提高代码质量。3.性能优化和最佳实践进一步提升应用效率。

PHP的影响：网络开发及以后Apr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP类型提示如何起作用，包括标量类型，返回类型，联合类型和无效类型？Apr 17, 2025 am 12:25 AM

PHP类型提示提升代码质量和可读性。1)标量类型提示：自PHP7.0起，允许在函数参数中指定基本数据类型，如int、float等。2)返回类型提示：确保函数返回值类型的一致性。3)联合类型提示：自PHP8.0起，允许在函数参数或返回值中指定多个类型。4)可空类型提示：允许包含null值，处理可能返回空值的函数。

See all articles