From my reading of delegation, it's really overloading, worded slightly
differently.. - but not that related to interfaces...
In the example below, which is a php'ized version of a C# demo, the
advantages of using interfaces (as far as I know) are primarly useful
for COM or CORBA, where it would be possible to generate all the
components for a CORBA/COM/.NET, or even java binding by reading the
interfaces.
A .NET binding would effectively define all the available interfaces and
classes, with strong typing!, and then when called (from C# or .NET)
invoke a C call to call_user_function, to run php exectuter....
(probably the best way to implement a .NET server in php, - compiling a
loosely typed language into .NET bytecodes, from reading about
python,perl etcs. experience is not the way to go..)
Other than being nice for documentation, in pure PHP, I cant really see
them being much use...
Interesting subject anyway..
Regards
Alan
called from C#
PHP_Celcius c = new PHP_Celcius(12.9);
system.out(c.toFarenheight().toString());
Interface temperature {
function __construct(float $value);
float function toCelcius();
float function toFarenheight();
}
class Celcius {
Implements temperature;
var $value=0;
function __construct($value) {
$this->value =0;
}
function toCelcius() {
return $this->value;
}
function toFarenheight($value) {
return $this->value * 1.5;
}
}
class Farenheight{
Implements temperature;
var $value=0;
function __construct($value) {
$this->value =0;
}
function toCelcius() {
return $this->value / 1.5;
}
function toFarenheight($value) {
return $this->value;
}
}
Wez Furlong wrote:
>Hi Ben,
>
>ZE2 will implement something that can used much like interfaces;
>Please see this RFC on Delegation; something very similar to the syntax
>described there will be in PHP 5.
>
>http://cvs.php.net/co.php/ZendEngine2/RFCs/004.txt?r=1.2
>
>Also, review the archives for [EMAIL PROTECTED] list for more
>information about the (long) discussion on the subject.
>(http://zend.com/lists/engine2/200206/maillist.html is a rough start).
>
>--Wez.
>
>On 08/20/02, "Ben Dischinger" <[EMAIL PROTECTED]> wrote:
>
>
>>What are the thoughts on implementing interfaces (as in object) within
>>PHP? Does the work outweigh the benefits?
>>
>>Ben Dischinger
>>
>>
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>
>
>
>
>
>
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