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If you have any questions, please contact WeChat: Le-studyg; in-depth exploration of PHP source code and understanding of its internal working principles is the path to advancement for every PHP developer. This course will lead students to analyze the source code of PHP (php-src), and comprehensively analyze the underlying implementation of PHP from core language features to extension mechanisms. By analyzing the source code, students will gain an in-depth understanding of PHP's internal mechanisms, such as memory management, garbage collection, function calls, etc., thereby improving their understanding of PHP performance tuning and extension development. This course is suitable for developers who have a certain foundation in PHP and who want to deeply understand the internal principles of PHP and improve their technical skills. Let us explore the source code world of PHP and uncover the mystery of PHP!