PHP Design Patterns: Facade Simplifies Complex Systems The Facade design pattern simplifies complex systems by providing a unified interface for clients. In PHP, the Facade pattern can be applied to libraries like PHPMailer, which can simplify email sending processes. By encapsulating complex operations, developers can create user-friendly interfaces and hide underlying complexities. Source: https://dev.to/xxzeroxx/php-design-patterns-facade-4doo