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<?php function replaceLettersWithNumbers($input) { $input = strtolower($input); $output = ""; for ($i = 0; $i < strlen($input); $i++) { $char = $input[$i]; if ($char >= 'a' && $char <= 'z') { $output .= (ord($char) - ord('a') - 1) . ' '; } else { $output .= $char . ' '; } } return trim($output); } $input = "test"; echo replaceLettersWithNumbers($input);
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