Check that a non-member has not already signed up as a volunteer before.
If that volunteer exists in the database: automatically fill in volunteer details in the form. (Use isExistUser method or UserID foreign key reference.
If is is a new volunteer: save the details to the database when the form is submitted.
Check that a non-member has not already signed up as a volunteer before.
isExistUser
method orUserID
foreign key reference.