Lukas Smith wrote:
> So please explain to me how you would write a singleton static method
> for a base class from which you can inherite. Suddenly the idea with
> using the class name becomes less useful.
IMHO, you need singleton factory :)
Inheritance is very strong relationship between classes. For example I
have base class 'Animal' and derived classes 'Dog' and 'Cat'. I can find
similarity between 'Dog' and 'Cat'. (They are animals)
If I have base class Singleton and derived classes 'MyCar' and 'MyCat'.
I can't find similarity between this classes.
Solutions is:
class SingletonFactory {
private $instances;
__construct() {
$this->instances = array();
}
function getInstance($name) {
if(is_a($this->instances[$name], $name) === false) {
$this->instances[$name] = new $name;
}
return $this->instances[$name];
}
}
FYI: SingletonFactory can be a pure static class.
--
Ondrej Ivanic
([EMAIL PROTECTED])
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