Controllers\Api\Statements::getParam PHP Méthode

    private function getParam($param)
    {
        $param_value = \LockerRequest::getParam($param);
        $value = json_decode($param_value, true);
        if ($value === null && $param_value === null) {
            throw new Exceptions\Exception("Expected `{$param}` to be defined as a URL parameter.");
        } else {
            if ($value === null) {
                throw new Exceptions\Exception("Expected the value of `{$param}` to be valid JSON in the URL parameter.");
            }
        }
        return $value;
    }