As your PHP application grows, you'll want to use the same logic on many pages without having to duplicate it, and you'll want to group together all the code that refers to a particular type of data (also known as a class of object). PHP has good support for objects as from release 4, and that support is greatly enhanced from release 5.

This topic is presented on public course Object Oriented Programming in PHP

animal1.php	An Abstract class - cannot construct directly
animal2.php	Abstract class, extended to a subclass, instantised via the subclass
animal3.php	Abstract class and interface example
bewarethedog.php	Object copying - beware - differs in PHP4 and PHP5
demo.php	PHP Version tester
dog.inc	Simple class in PHP
dogdisc.php	Serialization of an object for save and restore
dogs.inc	Simple class in PHP
elligant.php	Gant chart in PHP
equip.inc	equip.inc - define pieces of equipment (base class)
equtest.php	PHP example - objects, foreach, array_push ....
equtest.php4	Explicits PHP4 - objects, foreach, array_push ....
hound.inc	Simple class in PHP
kennel.php	Application to use class hound
ns.php	Namespaces in PHP5 - a short syntaax demo
pdemo.php	PHP application using places.inc - create array of place objects from file
pets.php	Test page for the dog.inc class
places.inc	A PHP abstract class (places) with postcode, county and other subclasses
serversys.inc	Server system - a derived class
staffsys.inc	Staff system - a derived class
studentsys.inc	Student system - a derived class
systems.php	Objects and inheritance - main worked example program
systems.php4	Objects and inheritance - main worked example program
systems.txt	Data file for systems example

Objects in PHP5