thanks it does help a lot, and I wrote mine at 4:30ish too :). does anyone know of any tutorials or example projects I can look at to find out about classes?
thanks for the help
On Sat, Dec 28, 2002 at 04:17:02 -0500, Paul Reed wrote:
> Objects are not simply a 'grouping' of functions, it's a fundamentally
> different approach to programming where variable and functions are
> grouped into objects. (OOP, or Object Oriented Programming)
>
> Objects contain all the necessary variables to hold the information on
> an item, and all the functions that work on that particular item.
>
> A class is simply a 'blue-print' for an object. (each object is made
> from that blueprint.)
>
> Say for instance you were doing a used auto site, and this site had many
> cars of different makes and models, and you wanted to assign a different
> markup to each car.
>
> Class c_Car
> {
> var $make;
> var $model;
> var $color;
> var $cost;
> var $markup;
>
> function price()
> {
> // '$this->cost' means the $cost variable in the current object.
> $price=$this->cost+($this->cost*$this->markup);
> return $price;
> }
> }
>
> // so I have 2 cars....
>
> $car1=new c_Car;
> $car1->cost=10000; // what the car cost you.
> $car1->markup=0.05; // 5% markup from cost for this car.
>
> $car2=new c_Car;
> $car2->cost=7500; // what the car cost you.
> $car2->markup=0.10; // 10% markup from cost for this car.
>
> echo $car1->price(); // output the price of car1, (10500).
> echo $car2->price(); // output the price of car2, (8250).
>
> As you can see, the function works internally to the object.
>
> To learn more, you should really read up on OOP. Overall it's an easier
> way to do most sites, but sometimes a simple collection of functions in
> an include file may be more practical (usually for sites with very
> little PHP).
>
> In the last few months, I have shifted my own programming techniques to
> use classes and I have found it tends to work better for almost every
> situation. Personally, I wish I had found out about them sooner!
>
> Hope this helps, (And I hope it makes sense, as I'm writing at 4:05am!)
>
> Paul Reed.
>
>
>
>
>
>
> -----Original Message-----
> From: Mat Harris [mailto:[EMAIL PROTECTED]]
> Sent: Friday, December 27, 2002 21:18
> To: [EMAIL PROTECTED]
> Subject: [PHP] object vs functions
>
> if i have a php script containing some functions, then all i have to do
> is
> include() the file and then call the functions.
>
> if i had an object (taking the example from php.net):
>
> <?php
> class foo
> {
> function do_foo()
> {
> echo "Doing foo.";
> }
> }
>
> $bar = new foo;
> $bar->do_foo();
> ?>
>
> what is the point of having the object, when i could just call the
> functions?
>
> what are the uses of objects over functions/groups of functions?
>
> sorry if this is an innane or frequently asked question.
>
> --
> Mat Harris OpenGPG Public Key ID: C37D57D9
> [EMAIL PROTECTED] www.genestate.com
>
--
Mat Harris OpenGPG Public Key ID: C37D57D9
[EMAIL PROTECTED] www.genestate.com
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