Following on from my previous post on value objects, immutability is often given as a core aspect of value objects. There is good reason for this, but it is not immutability that make an object…

Since PHP Value Objects is now a thing, I thought I’d write about them as well. You may also want to read http://kacper.gunia.me/blog/ddd-building-blocks-in-php-value-object and http://kacper.gunia.me/blog/…

Yesterday the initial preview of the new Symfony Best Practices was made available. A document like this is something that the Symfony community has needed. It is a much appreciated effort by those involved in…

BDD is primarily about designing object behaviour and interaction and not about testing. It does however produce a suite of regression tests as a side effect. This has value in allowing us to refactor code…

In my previous post I talked about avoiding optional dependencies. The example I used was of changing an optional dependency on a logger into a mandatory one. We injected a null logger implementation when we…

In my previous post I argued against setter injection. Optional dependencies are one of the main objections raised in the comments and elsewhere. I did mention these with a suggestion of just making them optional…