Creating Interfaces in PHP

I'm trying to move a system over to a Object oriented approach and want to find out if it is possible to create an interface in PHP similiar to the interfaces in JAVA?

There seems little resources on this on the web but it would appear to be something vitual in a develpoment enviroment.

Any questions on other object PHP stuff i'm happy to feed out my research.

Interfaces in PHP: I found it in the end.... Bit messy, PHP really needs to update this inline with Java!

<?php
class Temperature {
var $value=0;
function Temperature($value) {
$this->value=$value;
}
function toCelcius() {}
function toFarenheight() {}
function getValue () {
$return $this->value;
}
}

class Celcius extends Temperature {
function Celcius($value) {
Temperature::Temperature($value);
}
function toCelcius() {}
function toFarenheight($value) {
return $this->value * 1.5;
}
}

class Farenheight extends Temperature {
function __construct($value) {
Temperature::Temperature($value);
}
function toCelcius() {
return $this->value / 1.5;
}
function toFarenheight($value) {}
}
?>
If you wanted to for implementation of the of the interface methods, you might do this;

class Temperature {
var $value=0;
function Temperature($value) {
$this->value=$value;
}
function toCelcius() {
die ( 'Method toCelcius not implemented' );
}
function toFarenheight() {
die ( 'Method toCelcius not implemented' );
}
function getValue () {
$return $this->value;
}
}

Are you aware, that you could have put [ php ] [ /php ] around your PHP???? It would make it alot easier to read ;P


If you wanted to for implementation of the of the interface methods, you might do this;

BTW, that's his code, just a bit easier to read