(1)Basic syntax: data types, variables, strings and arrays, functions, MySQL database, etc.; (2) Use Bootstrap to quickly create front-end and back-end interfaces; (3) Classic CURD (add, delete, modify, query) operations of MySQL database; (4) User registration, login and authority management; (5) User posting and comment management; (6) Perfect data paging processing technology; (7) More knowledge, looking forward to your learning...