Exercise: CRUD Operations in PHP with MySQL
bjective:
O
Create 
       a 
           simple 
                   web 
                        application 
                                     that 
                                           allows 
                                                   users 
                                                          to 
                                                              perform 
                                                                       CRUD
(Create, 
         Read, 
                 Update, 
                          Delete)
                                  operations on
                                                  aMySQLdatabase
                                                                     using
PHP.
Instructions:
1. Setup Database:
   - Create a MySQL database named `student_db`.
   
   - Create a table named `students` with the following columns:
   
     - `id` (INT, Primary Key, Auto Increment)
     
     - `name` (VARCHAR(100))
     
     - `email` (VARCHAR(100))
     
     - `age` (INT)
     
2. Create PHP Files:
   - `config.php`: Contains database connection settings.
   
    - ̀index.php`: 
                     Displays 
                                the 
                                     list 
                                           of 
                                               students
                                                        and
                                                            provides
                                                                     links
to add, edit, and delete records.
   - `add.php`: Form to add a new student.
   
   - `edit.php`: Form to edit an existing student.
   
   - `delete.php`: Deletes a student record.
   
3. Testing:
    - 
      Test 
             the 
                  application 
                               by 
                                   adding, 
                                            editing,
                                                     and
                                                         deleting
                                                                  student
records to ensure all CRUD operations work correctly.