Practical PHP Programming:Object-oriented programming

From IpbWiki

The object-oriented programming (OOP) paradigm has been around for many years now, although the degree to which it is support varies widely across languages. C++, for example, is object-oriented C, and, as some purists would say, implements more OOP functionality than even Java does.

Before PHP 5 came along, OOP support in PHP was quite flaky and more of a hack than a serious attempt. As a result the few that used it often regretted the choice, and it is not surprising that the whole system got a full rewrite in PHP 5 - it is now much more advanced and flexible, and should please just about everyone.

Topics covered in this chapter are:

• Objects and classes defined
• Class inheritance
• Access control
• Runtime type information
• Abstract and final properties and functions
• Constructors and destructors
• Magic functions

Chapter contents

• 5.1. Practical_PHP_Programming:Conceptual overview of object orientation
• 5.2. Practical_PHP_Programming:Classes explained
  • 5.2.1. Practical_PHP_Programming:Defining a class
  • 5.2.2. Practical_PHP_Programming:How to design a class
  • 5.2.3. Practical_PHP_Programming:Basic class inheritance
  • 5.2.4. Practical_PHP_Programming:Overriding functions in subclasses
• 5.3. Practical_PHP_Programming:An introduction to objects
• 5.4. Practical_PHP_Programming:Using variables in classes and objects
• 5.5. Practical_PHP_Programming:The "this" variable
• 5.6. Practical_PHP_Programming:Objects within objects
• 5.7. Practical_PHP_Programming:Access control modifiers
  • 5.7.1. Practical_PHP_Programming:Public
  • 5.7.2. Practical_PHP_Programming:Private
  • 5.7.3. Practical_PHP_Programming:Protected
  • 5.7.4. Practical_PHP_Programming:Final
  • 5.7.5. Practical_PHP_Programming:Abstract
  • 5.7.6. Practical_PHP_Programming:Iterating over object variables
• 5.8. Practical_PHP_Programming:Reading object type information
• 5.9. Practical_PHP_Programming:Class hints
• 5.10. Practical_PHP_Programming:Constructors and destructors
  • 5.10.1. Practical_PHP_Programming:Calling parent constructors
  • 5.10.2. Practical_PHP_Programming:Destructors
  • 5.10.3. Practical_PHP_Programming:Deleting objects
• 5.11. Practical_PHP_Programming:Copying objects
• 5.12. Practical_PHP_Programming:Comparing objects
• 5.13. Practical_PHP_Programming:Saving objects
• 5.14. Practical_PHP_Programming:Magic functions
• 5.15. Practical_PHP_Programming:Static class variables
• 5.16. Practical_PHP_Programming:Functions for handling classes
• 5.17. Practical_PHP_Programming:Introduction to interfaces
• 5.18. Practical_PHP_Programming:Dereferencing object return values
• 5.19. Practical_PHP_Programming:The object-oriented website
  • 5.19.1. Practical_PHP_Programming:A basic OOP site
  • 5.19.2. Practical_PHP_Programming:A more complex OOP website

Next: Practical_PHP_Programming:Conceptual overview of object orientation