Object Oriented Programming Help

[darknessmdk]

So I've deceided to learn Object Oriented Programming and i looked the tutorial on this site and found it very confusing. Does anyone know of a example that someone could show me or another tutorial. A practical example would be great. Thanks

[HeyRay2]

Heres a good series:

 

http://www.tutorialized.com/tutorials/PHP/OOP/1

[Glyde]

Here is a basic sample script you can upload and run:

 

<?php
class myClass {
     var $className = "myClass";
     var $x = 1;
     function printClass() {
          print $this->className;
     }
}
class testClass extends myClass {
     var $className = "testClass";
     var $y = 2;
     function myFunction() {
          $sum = $this->x + $this->y;
          print "x + y = " . $sum;
     }
}
$m = new myClass();
$t = new testClass();
$m->printClass(); // Should output 'myClass'
$t->printClass(); // Should output 'testClass'
$t->myFunction() // Should output x + y = 3;
?>

That's sort of a general tutorial on how classes work (using the $this-> syntax), and how extending classes works.  OOP is really simple in PHP, and when you look at it in the simplest form, it's just a collection of functions and variables which may or may not have a relation.

[darknessmdk]

awesome! thanks to the both of you

[lifeson2112]

I was looking at the code and noticed the $this variables pointing to the object. Does PHP reserve these variables?

[Glyde]

Yes, $this is a PHP reserved variable.  Only in a class though.  I believe it is valid to be used outside of a class.