Re: Singleton with variable parameters

On Wed, Dec 15, 2010 at 2:11 PM, Sebastian Detert <php-maillist@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 slow. > 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. -nathan