Object Orientated

Anon

Hi,

I am in the process of developing a Intranet for a company, I have already decided to use PHP and if possible I want to implement it using Object Orientated principles. My question is how far does PHP go to supporting the Object Orientated principle? I last used PHP almost a year ago and the OO was more Object Based has it developed further since then?

Any help is much appreciated.

Luke Richards

sepodati

There are a couple articles here on PHPbuilder that talk about OO programming with PHP.

What features are you looking for? What are you trying to accomplish?

---John Holmes...

Anon

Hi,

I am a Student at Uni and recently completed a module on OODA (OO Design and Architecture). I would like to apply the things that I learnt about patterns to my final project using PHP. I know it can do inheritance, but one of the main aspects is polymorphism which I wasn't sure whether PHP could do.

I wanted to know whether I can apply patterns like Composite, Factory, Singleton, Visitor and Observer. I am not even sure of the applicability to the final project as yet but I would like to know for future reference. They could well help in the development of the application(s) that I am looking to do.

Thanks for you response and help.

Luke Richards

sepodati

Check the Articles section. There is an article that talks about OO programing, inheritance, and polymorphism, and how PHP handles all of it...

Some limitations of PHPs classes:

You can only extend a class, or have inheritance, for one level.
Subclasses to not call the constructor of the parent class.
There is no easy function overloading. The article gives a sort of work around...
There are no destructors for the class.

---John Holmes...

Anon

This is absolutely, 100%, incorrigibly wrong.

Even though PHP is a 'stateless' scripting initiative (meaning that stat cannot be maintained persistently through a session), PHP does provide for 'pseudo-stateful' experiences.

You can build a factory very much like Java (such as a Stored Procedures factory). In PHP, you would do something like: spFactory::call($procedurename,array($cursor_vars));
You can have multi-level inheritance with OOP in PHP if done correctly where you design properly built heirarchical classes (application, component, independent application (that can be used on any level)). One good thing to do is adopt the user of PEAR (see http://www.php.net/PEAR ).
Destructors are possible (I use constructorName()) to name my desctructor method and inside that method, call appropriate methods (in PEAR, you do $this->PEAR()😉 and so on.

There is much more beyond this but this can at least open the doors to more input by people who actually know something about true OOP and OOD.

chad.