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OOP In PHP (Object Oriented Programming in PHP)

Posted by chaabant on Mar 28, 2008

This is a basic introduction on how to use OOP – Oriented Programming In php

Declaring a Class

class myClass {
// Class contents go here
}[/code]

Instantiating an Object

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$myClassInst = new myClass();
 
$myClassInst = new myClass();

OOP Class Inheritance

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class a {
 
function test()
{
echo "a::test called";
}
 
function func()
{
echo "a::func called";
}
}
 
 
class b extends a {
 
function test()
{
echo "b::test called";
}
}
 
class c extends b {
 
function test()
{
parent::test();
}
 
}
 
class d extends c {
 
function test()
{
b::test();
}
 
}
 
$a = new a();
$b = new b();
$c = new c();
$d = new d();
 
$a->test(); // Outputs "a::test called"
$b->test(); // Outputs "b::test called"
$b->func(); // Outputs "a::func called"
$c->test(); // Outputs "b::test called"
$d->test(); // Outputs "b::test called"
 
class a {

function test()
{
echo "a::test called";
}

function func()
{
echo "a::func called";
}
}

class b extends a {

function test()
{
echo "b::test called";
}
}

class c extends b {

function test()
{
parent::test();
}

}

class d extends c {

function test()
{
b::test();
}

}

$a = new a();
$b = new b();
$c = new c();
$d = new d();

$a->test(); // Outputs "a::test called"
$b->test(); // Outputs "b::test called"
$b->func(); // Outputs "a::func called"
$c->test(); // Outputs "b::test called"
$d->test(); // Outputs "b::test called"

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