PHP development basics, classes and objects

• Chapter1 Access to classes and class members
• 1-1 Class declaration and instantiation techniques
• 1-2 Knowledge of class attributes and class constants
• 1-3 Class automatic loading technology
• 1-4 Access restriction and encapsulation technology of class members
• Chapter2 static keyword and overloading technology
• 2-1 Class inheritance and code reuse
• 2-2 Detailed explanation of the use of range parsing operator (::)
• 2-3 Detailed explanation of static keyword
• 2-4 Late static binding technology
• 2-5 Overloading techniques for attributes and methods in classes
• Chapter3 Namespace full contact
• 3-1 Detailed explanation of Trait characteristic technology
• 3-2 First introduction to namespaces
• 3-3 How to declare multiple namespaces in one script
• 3-4 How to import an external namespace