Chapter 20. PHP and Zend Engine Internals

Like most Americans, I drive a car to work. I know the basic capabilities of my vehicle. I know how fast it can go, how quickly it can brake, what speeds feel safe to make a turn. I also know about the basic maintenance of my car. I know I need to change my oil every 3,000 miles and to check my tire pressure regularly. In a pinch, I can even change my own oil, although I prefer to let someone else deal with the mess.

I remember enough from physics class that I could tell you how an internal combustion engine works in general, but I’m certain I know nothing about how a turbocharger works or what a “dual overhead cam” really means for my car’s maintainability and performance. It’s okay that I ...

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