After logging in with the same type of user, you should have the appropriate action page and action permissions.<br>Teacher login: with the corresponding operational rights for performance management, after the user logs in, through the data check to verify the success of the login, to avoid directly entering the address for access and other illegal methods of operation.<br>Student login: have the operation right of the grade query, after the user logs in, through the data check to verify whether the successful login, the grade query through the student login obtained the school number, to the database to query the student's semester, each course performance data, and return to the front desk for display.
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