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How to check if two equal-length strings are at least 50% equal in PHP

1 Answer

0 votes
function are50PercentEqual($str1, $str2) {
    if ($str1 == null || $str2 == null || strlen($str1) != strlen($str2)) {
        return false;
    }

    $matchingChars = 0;

    for ($i = 0; $i < strlen($str1); $i++) {
        if ($str1[$i] == $str2[$i]) {
            $matchingChars++;
        }
    }

    return ((double) $matchingChars / strlen($str1)) >= 0.5;
}

$str1 = "java c# c php python";
$str2 = "java c# c r rust php";

if (are50PercentEqual($str1, $str2)) {
    echo "yes";
} else {
    echo "no";
}



/*
run:

yes

*/

 



answered May 10, 2024 by avibootz

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