(This set of courses is divided into three stages: The first stage: the basic part to learn the basic knowledge of PHP development, and analyze the common vulnerabilities of PHP; the second stage: the advanced part to practice the PHP vulnerability shooting range, understand the mainstream PHP website development technology in the market, and analyze the market Vulnerabilities in mainstream frameworks, the third stage: advanced chapter PHP code demonstration audit technology, and will manually develop PHP framework, understand the core technology of large websites!)