Practice makes perfect, except when writing PHP code! Our new column Pragmatic PHP explains patterns and variations I’ve used over the years. The better we understand a pattern, the better we can successfully solve the problem before us. This month we’ll take a deep dive into the Singleton Design Pattern. Even though it’s generally considered an anti-pattern, we’ll see useful variations I use time and again. Can global state, static methods, and properties be unit tested? Certainly. We’ll see how.