Question: by using PHP MYSQL:When the teacher selects the class from a drop - down list, he will again select the subject from the drop -

by using PHP MYSQL:When the teacher selects the class from a drop-down list, he will again select the subject from the drop-down list that the students of the previously selected class are studying.
A table containing the names of students in the previously selected class will appear for him to write the grades for the 4 tests
It is possible to set empty degrees
by using PHP MYSQL:When the teacher selects the class from a

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