i) Objects
ii) Declaring a class
iii) The New Keyword and Constructor
iv) Destructor
v) Access method and properties using & this variable
vi) Public, private, protected, properties and method
vii) Select Properties and method
viii) Class Constant
ix) Inheritance & Code reusability
x) Polymorphism
xi) Parent Self Keyword
xii) Instance of Operator
xiii) Abstract Method and Class
xiv) Interface
xv) Final
xvi) Database Connectivity
xvii) CRUID Operation