Now you have the knowledge to create your own classes and objects in PHP using OOP! Take some time to review the concepts before moving on:

• Classes are defined using the class keyword.
• Functions defined within a class become methods and variables within the class are considered properties.
• There are three levels of visibility for class members:
  • public (default) - accessible from outside of the class
  • protected - only accessible within the class or its descendants
  • private - only accessible within the defining class
• Members can be defined to be static.
  • Static members are accessed using the Scope Resolution Operator (::).
• Classes are instantiated into objects using the new keyword.
  • Members of an object are accessed using the Object Operator (->).