/** * Converts the inserted string boolean to a PHP boolean. * * @param string $bool * * @return null|bool */ protected function convertStringToBool($bool) { $bool = strtoupper($bool); if ($bool === strtoupper($this->schema->false())) { return false; } elseif ($bool === strtoupper($this->schema->true())) { return true; } else { return; } }