Symfony

Symfony is the most well-architected PHP framework available. Dependency injection, event-driven architecture, robust security, and a component library that other frameworks depend on. If you're building in PHP, Symfony is the correct choice.

The constraint is the language, not the framework. Symfony does everything right within the PHP ecosystem — the problem is that the PHP ecosystem itself offers less than TypeScript for full-stack web development. For existing Symfony applications, the framework is a strength. For new projects, the same architectural quality exists in TypeScript frameworks without the language split.