(The core competence of senior engineers - reading source code. This course will take you to deeply analyze the php7 source code, so that you can fully grasp the principles, kernel mechanisms, core technical points, PHP extension and architecture design ideas behind the php7 source code, improve your source code reading and analysis ability, improve your programming ability and code design ability, and enable you to quickly break through the technical bottleneck, solve the problems of performance tuning and high concurrency, and easily deal with PHP advanced interview and technical problems.)