On Wed, Dec 15, 2010 at 2:11 PM, Sebastian Detert <php-maill...@elygor.de>wrote:

> Hi guys,
> I am trying to generate an abstract Singleton class for use in arbitrary
> classes, like
> class Foo extends Singleton {}
> and generate a new class with Foo -> getInstance();

Until traits release I think you'll find this painful as any class that
extends Singleton must now have extra functionality imbued via interfaces
and composition.

You will probly prefer to use a registry, something like
Registry::getInstance('classname', array('parameters'));

Even if you go with an abstract base class you will want an array of
instances internally.

How can I manage to use this with an unkown number of parameters like Foo ->
> getInstance('a', 'b'); ?

yes, func_get_args() & call_user_func_array() however, fyi, these are very

> Something like "self::$instance = call_user_func (array(static ,
> "__construct"), func_get_args());" instead of "self::$instance = new self;"
> doesn't work and an eval() is too slow.

if performance is a concern why not use setters to establish state on all of
your classes and keep the getInstance method down to 0 params.  As long as
your singletons aren't immutable this should work just fine.


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