marc serra wrote:
hi,
i'm looking for a solution to change the object's class.
i got a class and a derived class like this: (just for example,
completly stupid ^^)
class Ex{
var a;
var b;
}
class Ex2 extends Ex{
var c;
}
i want to create an object Ex and after change the object class to Ex2
to complete him like this:
$ex = new Ex();
$ex->a = 1;
$ex->b = 2;
$ex2 = (Ex2)$ex; /// here i want to convert object Ex to object Ex2
$ex2->c = 5;
Can someone help me? I know it's possible to do this in JAVA but it is
possible to do the same in PHP ?
its not possible exactly how you propose it, but I can certainly see a way of doing it
, something like (just an idea - code is not tested):
class Ex {
function __contruct($extend = null)
{
if (is_object($extend)) {
$parents = parent_classes($this);
if (in_array(get_class($extend, $parents))) {
// is a parent!
// now do some kind of loop to set the vars
// of $this to the values of the same vars in $extend
// maybe reflection would a good way to write this
// generically
}
}
}
var a;
var b;
}
class Ex2 extends Ex {
var c;
}
$A = new Ex();
$A->a = 1;
$A->b = 2;
$B = new Ex2( $ex );
$B->c = 5;
also you might want to look into writing a custom __clone() method
for the relevant class which returns a different (subclass) object
underwhatever circumstances (I have no idea whether it is allowed to return
an object from __clone() of a different class to the class of the object
you are cloning)
thx in advance,
Marc.
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