php - 在php中查找两个字符串之间的匹配百分比？

Question

谁能建议我一个更好的方法（或最首选的方法）来使用模糊逻辑找到两个字符串之间的匹配百分比（即这两个字符串（例如名称）在百分比方面的相关程度）。？谁能帮我写代码？真的我想知道从哪里开始..

Answer 1

$str1 = 'Hello';
$str2 = 'Hello, World!';
$percent;
similar_text($str1, $str2, $percentage);

http://php.net/manual/en/function.similar-text.php

Answer 2

字比较器

这是基于单词的比较 - 它比基于字符的比较快得多，而且按单词比较人类文本通常更有意义。但是，字长确实很重要。该算法考虑到这一点，以获得更好的结果。最后检查测试结果；我认为它们几乎就是人类会说的。

function wordSimilarity($s1,$s2) {

    $words1 = preg_split('/\s+/',$s1);
    $words2 = preg_split('/\s+/',$s2);
    $diffs1 = array_diff($words2,$words1);
    $diffs2 = array_diff($words1,$words2);

    $diffsLength = strlen(join("",$diffs1).join("",$diffs2));
    $wordsLength = strlen(join("",$words1).join("",$words2));
    if(!$wordsLength) return 0;

    $differenceRate = ( $diffsLength / $wordsLength );
    $similarityRate = 1 - $differenceRate;
    return $similarityRate;

}

此函数为您提供介于 0 和 1 之间的浮点值，其中 1 是总相似度。

让我们看看一些测试

    $test = "this is something you've never done before";
    
    wordSimilarity($test,"this is something you've never done before");  //  1.000
    wordSimilarity($test,"this is something");                           //  0.588
    wordSimilarity($test,"this is nothing you have ever done");          //  0.312
    wordSimilarity($test,"leave me alone with lorem ipsum");             //  0.000
    wordSimilarity($test,"before you do something you've never done");   //  0.845
    wordSimilarity($test,"never have i ever done this");                 //  0.448