Veri merkezli birçok uygulamada Repository (ki o uygulamada muhtemelen bu, “entity repository”dir) ile DAO (Data Access Object) aynı işi yapar…
https://github.com/abdullahpazarbasi/design-patterns-in-php/tree/master/GangOfFour/Behavioral/ChainOfResponsibility
https://github.com/abdullahpazarbasi/design-patterns-in-php/tree/master/GangOfFour/Behavioral/Command