Str::diff

gistfile1.txt

        Str::macro('diff', function (string $compare, string $to) {
            // First we'll find the determine the bitwise difference between the two strings, using the bitwise XOR operator (^) to compare them.
            // Then we'll utilize strspn to determine the position where a difference is found.
            $from_start = strspn($compare ^ $to, "\0");

            // Next we'll determine the end position, by reversing both strings then utilizing strspn as before.
            $from_end = strspn(Str::reverse($compare) ^ Str::reverse($to), "\0");

            // here we snip out original value
            $value = Str::substr($compare, $from_start, (strlen($compare) - $from_end) - $from_start);
            // next, the difference to that value.
            $difference = Str::substr($to, $from_start, (strlen($to) - $from_end) - $from_start);

            return [
                $value => $difference,
            ];
        });