- PHP OOP: Classes and Objects
- PHP OOP: Inheritance and Access Modifiers
- PHP OOP: Abstract Classes, Interfaces, and Namespaces
- PHP OOP: Static Methods and Properties (Class-Level Tools)
- PHP OOP: The Destructor Method
- PHP OOP: Traits (Horizontal Code Reuse)
- PHP OOP: Class Constants (Fixed Values)
- PHP OOP: Iterables (Traversing Data Structures)
- PHP Date and Time
- PHP Include and Require
- PHP File Handling (Advanced Stream Functions)
- PHP File Open/Read (Handling File Pointers)
- PHP File Create/Write (Handling File Pointers)
- PHP Cookies (Client-Side State Management)
- PHP Sessions (Server-Side State Management)
- PHP Filters (Data Cleaning and Validation)
- PHP Filters Advanced (Schematic Validation)
- PHP Callback Functions (Dynamic Functions)