Objects within Objects question

[silverglade]

Hi, I have some code I am a little confused about. If anyone can help me I'd appreciate it. Below is the code and I have commented my question within the code. Thanks.

 

class DogTag {

                  public  $Words;

           }

           class Dog {
                             public $Name;
                             public $DogTag;// I don't know what this variable is for it looks like we never use it.
                                                         //since we make the new DogTag object below from the class, what 
                                                           // do we need the $DogTag variable for please?
                             public function bark() {
                                 print "Woof!\n";
                              }
                            }

           $poppy = new Poodle;
           $poppy->Name = "Poppy";
           $poppy->DogTag = new DogTag;
           $poppy->DogTag->Words ="My name is Poppy. If you find me please call 555-1234";
                    

[gizmola]

The code is very simple:

 

$poppy->DogTag = new DogTag;

 

This is creating a "DogTag" object and assigning it to $poppy->DogTag.

 

So clearly the DogTag variable in the Dog object IS being used, so store an associated DogTag object.

[silverglade]

Oops. that was simple. I wasn't used to seeing a variable with -> on it. I was used to seeing this. $newObject = new Object; Thank you for explaining it.

[gizmola]

The -> is used to access the variables and methods of an object:

 

echo $obj->variable;

echo $obj->method();  // assumes that function method() returns something.

 

[silverglade]

Ok thank you  :)