joomla-framework / form

			// If the field is required and the value is empty return an error message.

			if (($value === '') || ($value === null))

			{

				if ($element['label'])

				{

					$message = Text::_($element['label']);

				}

				else

				{

					$message = Text::_($element['name']);

				}

				$message = Text::sprintf('JLIB_FORM_VALIDATE_FIELD_REQUIRED', $message);

				return new \UnexpectedValueException($message);

			}

			else

			{

				$message = Text::_($element['label']);

				$message = Text::sprintf('JLIB_FORM_VALIDATE_FIELD_INVALID', $message);

				return new \UnexpectedValueException($message);

			}

		}

		return true;