Wrap PHP's built-in levenshtein() to return a similarity score from 0.0 (totally different) to 1.0 (identical). Handy for "did you mean…?" suggestions.
PHP
<?php
function similarity(string $a, string $b): float {
if ($a === $b) return 1.0;
if ($a === '' || $b === '') return 0.0;
$maxLen = max(strlen($a), strlen($b));
return 1.0 - (levenshtein($a, $b) / $maxLen);
}
printf("%.2f\n", similarity('kitten', 'sitting')); // 0.57
printf("%.2f\n", similarity('php', 'phpx')); // 0.75
printf("%.2f\n", similarity('hello', 'hello')); // 1.00Save your own code snippets
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