- PHP can be used to build enterprise-level applications and integrate with existing enterprise technologies and architectures. While other technologies may be better suited for certain backend tasks, PHP excels at building scalable web applications. - Common enterprise design patterns around scalability, high availability, and integrity can be applied to PHP implementations. Specific patterns also exist for scaling MySQL databases and leveraging Apache modules like mod_rewrite. - PHP applications can interface with Java backends using bridges. This allows leveraging the strengths of each technology by using PHP for the frontend and Java for enterprise services.