如何在php中检查两个字符串的相似性？

Question

说我有两个字符串

$string1 = "Hello my name is Steve and this is spam";
$string2 = "Hello my name is Steven and this comment is spam";

这两个字符串是相似的.

有没有办法比较这些,如if ($string1 like $string2)在PHP？

Answer 1

您可以使用levenshtein算法计算相似性指数.它计算需要更改的字符数,以便将第一个输入转换为第二个输入,或者相反:

levenshtein("bar", "baz"); // 1 character difference
levenshtein("bar", "foo"); // 3 character difference

$string1 = "Hello my name is Steve and this is spam";
$string2 = "Hello my name is Steven and this comment is spam";
levenshtein($string1, $string2); // 9 character difference

@TimCooper也建议similar_text(),它以类似的方式工作.