Updates on Student Management System (pure PHP)

We want few small changes/updates on Student Management System (pure PHP ). 1- Currently classes are marked as 'Taken' and 'Running' when 'teacher' clicks on 'start' and 'end' button from his account ( [login to view URL] ). NOW, we want to mark classes as 'Taken' and 'Running' from 'student' side when 'student' clicks on 'Take Class' button ( [login to view URL] ). 2- Currently classes should be 'activated' at exactly after every 30min. like 12:00 and 12:30, but there is an issue due to which 'activate' button works after 1min (like 12:01,12:31 ) which should be fixed. 3)- "Send Monthly Invoice' ( [login to view URL] ) send all due invoices but it's not working which will be fixed. 4)- This is WebRTC feature which is already working. Now want to make few changes to have communication with Teacher and Admin side. A)- You will auto load this URL ( [login to view URL] ) with teacher's home page and add Teacher's ID (from database ) after ( number= ) at the end of URL. B)- You will enter Admin ID ( from database) in the input field. C)- You will auto click this button ( [login to view URL] ) via javascript. D)- Then we will create a button on this page ( [login to view URL] ) which will load this URL ( [login to view URL] ) in Popup and add Admin ID (from database) after 'number-' . E)- Add ''teacher's ID (from database) in the input field ( [login to view URL] ), and auto click this button upon page load( [login to view URL] ) via javascript.