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<?php function encryptLettersToNumbers($input) { $output = ''; $input = strtolower($input); for ($i = 0; $i < strlen($input); $i++) { $char = $input[$i]; if (ctype_alpha($char)) { $number = ord($char) - ord('a') -$n; $output .= $number . ' '; } else { $output .= $char; } } return trim($output); } $input = "arab"; $encrypted = encryptLettersToNumbers($input); echo $encrypted;
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