core-bundle/src/Resources/contao/library/Contao/Message.php
public static function add($strMessage, $strType, $strScope=TL_MODE)
	{
		if ($strMessage == '')
		{
			return;
		}

		if (!\in_array($strType, static::getTypes()))
		{
			throw new \Exception("Invalid message type $strType");
		}

		System::getContainer()->get('session')->getFlashBag()->add(static::getFlashBagKey($strType, $strScope), $strMessage);
	}
public static function add($strMessage, $strType, $strScope=TL_MODE)
	{
		if ($strMessage == '')
		{
			return;
		}

		if (!\in_array($strType, static::getTypes()))
		{
			throw new \Exception("Invalid message type $strType");
		}

		System::getContainer()->get('session')->getFlashBag()->add(static::getFlashBagKey($strType, $strScope), $strMessage);
	}
public static function add ( $ strMessage , $ strType , $ strScope = TL_MODE ) { if ( $ strMessage == '' ) { return ; } if ( ! \ in_array ( $ strType , static :: getTypes ( ) ) ) { throw new \ Exception ( "Invalid message type $strType" ) ; } System :: getContainer ( ) -> get ( 'session' ) -> getFlashBag ( ) -> add ( static :: getFlashBagKey ( $ strType , $ strScope ) , $ strMessage ) ; }
Add a message

@param string $strMessage The message text
@param string $strType    The message type
@param string $strScope   An optional message scope

@throws \Exception If $strType is not a valid message type
Add a message