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<?php $sentence = strtolower('Cozy Qbert honks grawlix'); $usage = count_chars($sentence, 3); $alphabet = range('a', 'z'); var_export([ 'Sentence' => $sentence, 'Total Length' => strlen($sentence), 'Alphabetical Length' => preg_match_all('~[a-z]~', $sentence, $letters), 'Unused Letters' => array_diff($alphabet, $letters[0]), 'Duplicated Letters' => array_diff(array_count_values($letters[0]), [1]), ]);
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56.89 ms | 402 KiB | 5 Q