Validating entries while adding driver profiles

Validate entries while adding driver profiles

In the admin section under manage drivers:- Under add drivers the following can be done: Restricting input of the type of car to the predefined car models and nothing else. Validating phone number entered (should be 10 digits, first digit should be between 6 and 9). Check for repetition of phone numbers. Repeats shouldn't be accepted.

Optional: Add a maximum and minimum limit for the cost per km entry. The maximum and minimum limits must be different for each car model.

Potential Bounty to be gained: Bounty points (apply for every successful PR submission): 40