'); try { $lisp->rep($input, $userEnv); if ($input) { readline_add_history($input); readline_write_history($historyFile); } } catch (MadLisp\MadLispException $ex) { print('error: ' . $ex->getMessage()); } catch (TypeError $ex) { print('error: invalid argument type: ' . $ex->getMessage()); } print(PHP_EOL); }