code: public static function unwrapResult($value)
      {
          if (is_string($value)) {
              if ((isset($value[0])) && ($value[0] == '"') && (substr($value, -1) == '"')) {
                  return substr($value, 1, -1);
              }
              //    Convert numeric errors to NAN error
          } elseif ((is_float($value)) && ((is_nan($value)) || (is_infinite($value)))) {
              return Functions::NAN();
          }
  
          return $value;
      }
docs: Remove quotes used as a wrapper to identify string values.
  
  @param mixed $value
  
  @return mixed