RE: [PHP] PHP object communication

I wonder does this go against OOP design though, as Martín suggested? Maybe I would be better off forgetting about the whole thing, and rethinking my approach? Apologies for the delay in replying btw, got sidetracked. And thanks for your reply. Thanks, adam ____________________________________________ Adam Beecher - CEO & Core Geek - ieWebs™ e ... ad@m.beecher.net w ... http://www.iewebs.com m ... Box 81, Eglinton St, Cork, Ireland ____________________________________________ > -----Original Message----- > From: Papp Gyozo [mailto:pgerzson@freestart.hu] > Sent: 26 October 2001 19.01 > To: ad@m.beecher.net; Martín Marqués; php-general@lists.php.net > Subject: Re: [PHP] PHP object communication > > > i don't want to sink deep inside your discussion, just give a hint: > use _references_! > > class DB { > var $core; > > function DB(&$core) > { > $this->core =& $core; > } > > } > > class ERROR { > var $core; > > function ERROR(&$core) > { > $this->core =& $core; > } > > } > > class CORE extends CONFIG { > var $db; > var $error; > > function CORE() > { > $this->error =& new ERROR($this); > $this->error =& new DB($this); > } > } > > > How can I access this | > > v > > $Core->Error->Something > > ^ > > From this | > > > > somewhere in one of the DB's methods: > > function db_at_fault() > { > $this->core->error->something(); > } > > ----- Original Message ----- > From: <ad@m.beecher.net> > To: "Martín Marqués" <martin@bugs.unl.edu.ar>; > <php-general@lists.php.net> > Sent: Thursday, October 25, 2001 12:55 PM > Subject: RE: [PHP] PHP object communication > > > > Hi again Martín, > > > > > Sorry for the TOO FAST RESPONCE! :-) > > > > > Itchy trigger finger, eh? :) > > > > > $Core is one object, and Error and DB are properties of the object. > > > > > > Let me put it clearer. You have an Error object, and you now want > > > to make a DB object, with the same properties of the Error object. > > > Just extend it. > > > > > Ah, but I don't want them to have the same properties you see, > I just want > > to be able to access the properties. I'm probably trying to understand > > something that simply isn't viable in OO, but I'd prefer to > learn from my > > mistakes than still have it niggling at the back of my mind. It > basically > > comes down to this: > > > > How can I access this | > > v > > $Core->Error->Something > > ^ > > From this | > > > > Consider the Car class: > > > > <?php > > > > class Brakes { > > ... > > } > > > > class Lights { > > ... > > } > > > > class Car { > > var $brakes, $lights; > > function Car() { > > $this->brakes = new Brakes; > > $this->lights = new Lights; > > } > > } > > > > ?> > > > > I can't use 'extends' in this instance, because I don't want to > mix up the > > braking and the electrical system. However I do want to access the > > electrical system if I hit the brake - to turn on the brake light. If I > > *did* in fact use 'extends', I would use parent::lights->something() to > > access the objects within Car. Is there some way of creating an > equivalent > > for sub-objects? Perhaps with references? > > > > NOTE: An option I've tried would be to have Lights extend Car, however > that > > gives me problems with the constructor. When I initialise the extension, > I'm > > also initialising a new instance of Car. If I don't call the > constructor, > I > > can't access the extended objects. If I do, I'm in a loop. > > > > I'm not making sense, am I? > > > > adam > > > > > > > > > > > > > > > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > > For additional commands, e-mail: php-general-help@lists.php.net > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > >