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<?php $pattern = "/(%\S*)/"; $replacement = "%s"; $input_str = "Controller '%d is potentially leaking. All controllers are supposed to have an empty reference count. If this is a non synch sound controller, then script will need to make sure to clean it up."; $messageParameters = ["CVSNyz368g="]; if (preg_match_all($pattern, $input_str, $matches_out)) { $printfCodes = $matches_out[1]; foreach ($printfCodes as $index => $printfCode) { if ($printfCode != "%s" && $printfCode != "%c") { $decodedIntAsString = $messageParameters[$index] . " translated!"; $messageParameters[$index] = $decodedIntAsString; } } } print_r( $messageParameters);