Class objects inside another class

[Cogen]

Hi there, I was wondering if someone could help me with a problem I'm having with referencing a class. Lets say I have a class "A", and inside that class I create an array of objects defined by class "B". When I create a class "A" object, how do I use the functions in class "B". Here is an example to show what I mean ...

class B {
	var $mID;

//Constructor:
function B($ID) {
	$this->mID = $ID;
}

function get_ID() {
	return $this->mID;
}
}


class A {
	var $BArray;

function A() {
	$BArray = array();
}

function addB($ID) {
	$BArray[] = new B($ID);
}
}

now I want to do ...

$objA	= new A(); //works
$objA->addB(89); // works

echo "My new B id is ".$A->B[0]->get_ID(); //doesn't work

[ahundiak]

assuming you cut and pasted then:

echo $objA->$BArray[0]->get_ID();

Should do the trick.

[Cogen]

Unfortunately that results in a Fatal error:

Call to a member function on a non-object 🙁

Thank you for the help ahundiak, do you have any other ideas?

[ahundiak]

You need a $this when setting member variables.

<?php
class B 
{
  var $mID;

  //Constructor:
  function B($ID) 
  {
    $this->mID = $ID;
  }
  function get_ID() 
  {
    return $this->mID;
  }
}
class A 
{
  var $BArray;

  function A() 
  {
    $this->BArray = array();
  }
  function addB($ID) 
  {
    $this->BArray[] = new B($ID);
  }
}
$objA = new A(); //works

$objA->addB(89); // works

echo $objA->BArray[0]->get_ID();
?>

[Cogen]

Thanks ahundiak. That was driving me crazy! I actually was using "this->" for one of the classes, but was forgetting to do it in the other class. duh.