Fatal error: Uncaught Error: Call to a member function query() on null in C:\Apache24\htdocs\soitec\persistencia\ProjetoDAO.php:20 Stack trace: #0 C:\Apache24\htdocs\soitec\xml\xmlgantt.php(21): ProjetoDAO->verificaCodPai() #1 {main} thrown in C:\Apache24\htdocs\soitec\persistencia\ProjetoDAO.php on line 20