[PHP] Yu Wen's record 3.2.0 commercial cracking version, responsive layout, including periodic table of elements+physical publicity table [PHP+MYSQL]

I heard that the 3.2.0 commercial cracking version of the classmate record removes domain name restrictions, has a responsive layout, and supports mobile devices. It's a good source code of the classmate record, and we share it with you!
Yu Wen Official Version of Student Record System V3.2
V3.2 Official Version
1. The message board cannot be opened after repair
2. Repair the right side of the computer and exit the display404
3. After repairing and changing permissions, the user cannot log in
4. Restore the same user name displayed in the student record
5. Repair failed to update job arrangement time
6. Add new authority: the class representative can perfect the function of assigning homework, and only the class representative can assign homework
7. Fix the vulnerability that caused the administrator's permission to be changed due to design defects in previous versions
8. The details of the registration page and landing page are optimized and more concise
V3.1 Incremental update
1. Restore music function
2. Installation troubles caused by previous negligence have been solved
3. Remove the confession wall (because last time I used free speech as the confession wall... something embarrassing happened... you understand)
v3.1
1. Remove dual homepage switching, and load faster
2. Add loading animation
3. Improve the authority function of each level
4. Add QQ music acceleration function
(It's really tiring and brain consuming to compile this program alone. I hope some great gods can cooperate with me to compile it.)