Practical design patterns in PHP (Part 3)
summary
Builds a working PHP event‑sourcing prototype: aggregates (invoice, shopping cart) record recorded domain events as mementos, events serialize to JSON and sit in either a file-system and in-memory stores (tests pass). Implements repository + simple event bus, replays event streams to reconstitute aggregate state, and refactors persistence into a storage strategy via Composer utilities (class-function). Notes it takes about half a day to prototype, warns it’s experimental and not yet production‑ready.
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chapters (11)
- 0:00Introduction to behavioral patterns
- 1:20Memento pattern explained
- 22:31Event sourcing with Memento
- 1:00:16Implementing event store
- 1:30:49State pattern for workflows
- 1:45:20Strategy pattern fundamentals
- 2:05:26Refactoring with Strategy
- 2:15:18Template method design
- 2:30:30Visitor pattern in PHP
- 2:45:58When to use Visitor pattern
- 2:50:07Summary and Q&A
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