A practical, independent guide aligned with the PHP Foundation’s compile-time generics proposal – monomorphization, constraints, and invariance, without the runtime cost.
This book is a summary of approaches to implement generics for the PHP programming language.
New • September 2025
The book will most likely appear in September 2025, and I will give updates here once I can. So if you are interested – put your email address in the formula below.
What you’ll learn
- Why compile-time generics fit PHP’s request model
- Monomorphization explained clearly (no runtime overhead)
- Constraints & invariance in practice (and what’s out of scope)
Table of contents (short)
- 1. The Dream of Generics in PHP
- 2. From Wish List to Proposal
- 3. Inside the Compile-Time Proposal
- 4. Constraints, Variance, and Type Safety
- 5–8. Examples, Testing, Open Questions, Future