Re: [PHP] Re: Add methods to object dinamically
On Tue, 2004-10-26 at 14:21, Francisco M. Marzoa wrote: > Greg Beaver wrote: > > > Sort of :) > > > > In PHP5, this will work. > > [...] > > Very nice, thanks a lot :-) > > > > > However, you won't have access to private or protected data members. > > Damn! that's exactly what I want! :-( > > > It is always better to rigidly define your methods, and extend the > > class as someone else suggested. > > The problem is that I need to serialize some objects to put them on a > database, but I'll have problems when some of these objects contains > another ones from third parties where I do not control the inheritance > and I've not access directly to object fields. > > Converting the object to an array is useful for serialization, as I can > access private and protected object member values, but I cannot > unserialize them because I cannot wrote those members again. > > Never mind. I surely must rethink the matter again. > > Thanks a million, Greg. Could you serialize the object then parse the serialized data yourself and manipulate the values as an array, then re-serialize back to object form and then unserialize as an object with modified protected/private members? Sounds like a lot of work, but it just might bypass the whole protected/private issue :) Not that it's generally a good thing to bypass such things *heheh*. Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Add methods to object dinamically
Greg Beaver wrote: Sort of :) In PHP5, this will work. [...] Very nice, thanks a lot :-) However, you won't have access to private or protected data members. Damn! that's exactly what I want! :-( It is always better to rigidly define your methods, and extend the class as someone else suggested. The problem is that I need to serialize some objects to put them on a database, but I'll have problems when some of these objects contains another ones from third parties where I do not control the inheritance and I've not access directly to object fields. Converting the object to an array is useful for serialization, as I can access private and protected object member values, but I cannot unserialize them because I cannot wrote those members again. Never mind. I surely must rethink the matter again. Thanks a million, Greg. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Add methods to object dinamically
Francisco M. Marzoa Alonso wrote:
I've seen that's possible to add members to objects dinamically, in
example:
class MyClass {
private $a;
}
$MyObject = new MyClass ();
$MyObject->b = 1;
Now $MyObject has a public member called 'b' that has a value of '1'.
The question is, is it possible to add methods in the same way?
I meant something such as:
function sum ( $this ) {
return $this->a+$this->b;
}
$MyObject->sum = sum;
Note that code will not work, but it illustrates what I'm asking for.
Sort of :)
In PHP5, this will work.
_methods[$method])) {
$call = $this->_methods[$method];
return $call($this);
}
}
public function __set($var, $value)
{
if (is_string($value) && is_callable($value)) {
$this->_methods[$var] = $value;
} else {
$this->$var = $value;
}
}
}
function test($o)
{
return $o->val;
}
$o = new DoesStuff;
$o->val = 4;
$o->test = 'test';
echo $o->test();
?>
However, you won't have access to private or protected data members. It
is always better to rigidly define your methods, and extend the class as
someone else suggested.
Greg
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[PHP] Re: Add methods to object dinamically
* Francisco M. Marzoa Alonso <[EMAIL PROTECTED]>:
> I've seen that's possible to add members to objects dinamically, in example:
>
> class MyClass {
> private $a;
> }
>
> $MyObject = new MyClass ();
> $MyObject->b = 1;
>
> Now $MyObject has a public member called 'b' that has a value of '1'.
>
> The question is, is it possible to add methods in the same way?
>
> I meant something such as:
>
> function sum ( $this ) {
> return $this->a+$this->b;
> }
>
> $MyObject->sum = sum;
No. There are some things you can look into, however. PHP4 has an
overload() function (and PHP5 has it built in) -- you could then add a
__call() method that checks to see if a function is defined, and if so,
calls it.
class MyClass
{
var $a;
// Note: you'd call this differently in PHP5
function __call($function, $arguments, &$return)
{
if (function_exists($function)) {
$function($arguments);
}
}
}
overload('MyClass'); // This line unncessary in PHP5
The other possibility is to look into the classkit extension
(http://php.net/classkit); this would require being able to install PHP
extensions (not a problem if it's your own box).
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