Re: OOP .. I just don't get it.

Hi Phillip Yes, thanks this does help. The problem with the tutorials that I have seen so far is that they are very simplistic and therefore do not reveal the benefits of this style of programming. If anybody knows of any good tutorials, I would appreciate a link. Thanks Peter (Mojo) Philip Hallstrom <philip@adhesivemedia.com> wrote in message news:20020305131346.J58026-100000@teak.adhesivemedia.com... > I'm not an OOP master, but I'll give it a shot. In your example below > you don't gain much from using OOP. However, consider this example (all > pseudo code)... > > class animal ( > function eat() ... > function sleep() ... > function walk() ... > ); > > class bird extends animal ( > function fly()... > #inherits eat,sleep,walk > ); > > > Now where this gets useful is when you want to create a class "duck". You > can just do this: > > class duck extends bird ( > function swim()... > #inherits eat,sleep,walk,fly > ); > > What's nice about this is you don't need to know the implementation of the > animal or bird class to do this. Heck you don't even need the source (just > the compiled library). All you need to know is the public functions (or > methods). However you still get all the functionality of an animal and > bird. > > You also get some overhead, but that's the price you pay. > > Does that help? > > Search the net for OOP tutorial and I'm sure you'll find some better > examples and reasons. > > -philip > > On Wed, 6 Mar 2002, mojo jojo wrote: > > > Hi > > > > I've been using php for a while now but I have not got my head around OOP > > (classes). > > > > Why bother using them? I've read thru a few tutorials on using classes and > > the examples given are quite simple. This is probably the problem - I just > > can't see the benefit of using this style of programming. > > > > Here is what I'm getting at. > > > > ------------USING A CLASS----------------- > > class Table { > > > > var $rows; > > var $columns; > > > > function MakeTable() { > > > > draw a table with $this->columns as the number of columns > > and $this->rows as the number of rows > > > > } > > } > > > > $mytable = new Table; > > $mytable->rows = 5; > > $mytable->columns = 10; > > $mytable->MakeTable(); > > > > ---------------USING A NORMAL FUNCTION----- > > > > function MakeTable($rows,$columns) { > > > > make a table with $rows as the number of rows > > and $columns as the number of columns > > > > } > > > > $rows = 5; > > $columns = 10; > > MakeTable($rows,$columns); > > > > ----------------------------------------------------------- > > > > Using a class doesn't appear to give me any benefits - in fact the code is > > longer. > > > > I know that you can spawn more instances of the same class which sounds > > useful, however I can also run my function as many times as I like using > > different variables. > > > > What am I missing here? > > > > Thanks > > > > Mojo > > > > > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > >