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php-collective/dto is a code-generation-based DTO library for PHP that avoids runtime reflection overhead. Instead of inspecting class metadata at runtime like spatie/laravel-data or cuyz/valinor, it generates plain PHP classes from configuration files (XML, YAML, NEON, or PHP). Benchmarks show it is 25-26x faster than reflection-based libraries for object creation, while still only ~2.2x slower than hand-written plain PHP. Key features include mutable/immutable modes, TypeScript type generation, JSON Schema output, field tracking for partial updates, enum support, validation rules, DTO inheritance, array shapes with full type inference, and collection adapters for Laravel, CakePHP, and Doctrine. A practical migration guide walks through incrementally replacing raw arrays with DTOs, starting at API boundaries and moving inward to service layers.

DTOs at the Speed of Plain PHP – DerEuroMark

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<p>Brilliant, always hated the fact that spatie use the term DTO in their documentation when it’s doing far too much for it to be a DTO. It’s damn near impossible to explain to junior developers that what they’re writing aren’t DTOs when reputable package maintainers/writers like spatie do shit like that.</p>
