Implementing interfaces

[walkintothelite]

I am current converting a system to an object orientated PHP approach. I am very familiar with java and am currently trying to see if it is possible to implement an interface in PHP similar to that of Java.

I know i could use an abstract class but this is not an ideal solution as it confuses somewhat the class relationships. And it forces having to extend a class rather than define a interface.

It is such a fundemental idea to the devlopement enviroment i'm suprised i have not found any sources on the internet about it yet.

Any ideas? I'm happy to share my research on OO in PHP with anyone.

[walkintothelite]

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;
}
}

[bbaassiri]

[IMHO] Remember PHP is not Java and current verison of PHP is not true object oriented, wait untill PHP 5, where classes in zend engine has been revamped

[walkintothelite]

Any ideas when we will be rubbing our hands in glee at the arrival of PHP 5?

[bbaassiri]

soon, i think beta release is sheduled for april, but take a look at the php site for complete details