有人能给我推荐一种更好的方法（或最喜欢的方法）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）在百分比方面的关系有多密切）吗。？有人能帮我写代码吗？真的，我想知道从哪里开始。。
$str1 = 'Hello';
$str2 = 'Hello, World!';
$percent;
similar_text($str1, $str2, $percentage);
http://php.net/manual/en/function.similar-text.php
字比较器
这里有一个基于单词的比较-它比基于字符的比较快得多，而且按单词比较人类文本通常更有意义。然而，单词长度确实很重要；该算法考虑了这一点，以获得更好的结果。最后检查测试结果；我认为他们几乎是一个人会说的话。
function wordSimilarity($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;
}
此函数提供一个介于0和1之间的浮点值，其中1是总相似性。
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