Until step 4 our ugly-looking app has become functional. It's time to give it a good look using bootstrap. Add a few more elements to the app to make it more professional.
config.php Holds all the global variables and database connections
functions.php All the functional code
header.php Global app header | Structure Change | Added Bootstrap CSS | Added Navigation Menu
footer.php Global app footer | Structure Change
index.php Search page with a seach form | Structure Change
students.php Student addition form | Structure Change
subjects.php subject addtition form | Structure Change