PHP multiple child classes, accessing child class to class

Question

I'm not entirely sure if this a understanding problem or syntax. I am trying to access child classes from other child classes under the same parent.

    class TopLevel {
    foreach (glob("assets/php/*.php") as $filename) // will get all .php files within plugin directory
      {
        include $filename;
        $temp = explode('/',$filename);
        $class_name = str_replace('.php','',$temp[count($temp)-1]); // get the class name 
        $this->$class_name = new $class_name;   // initiating all plugins
      }
    }

    class A extends TopLevel {
        $var = 'something';
        public function output() {
            return $this->var;
        }
    }

    class B extends TopLevel {
        // This is where I need help, CAN the child class A be accessed sideways from class B? Obviously they need to be loaded in correct order of dependency.
        $this->A->output();
    }

I don't see why this shouldn't work. Not very good structure but its a single object application.

Also you might want to look into [proper autoloading](http://php.net/manual/en/function.spl-autoload.php) instead of whatever it is your doing now. — PeeHaa, Feb 17 '15 at 23:41
Your code is incomplete, but what you're trying to do should work if the foreach is in the constructor of the TopLevel class. — Dragony, Feb 18 '15 at 00:02
I used this autoloding because it initiates the sub class as an object inside the main. Like I said, this structure is not correct. The relation for example would be template data in class A and the flow/logic is in Class B. — Eric Samuel, Feb 18 '15 at 00:06
I was not asking about that kind of relation. How would instance A be aware of instance B. Or the other way around? — PeeHaa, Feb 18 '15 at 00:23
Opps your right, They don't directly, only via parent. I did type $self there, as stated could simply be syntax error; but its not normal structure of code. It should be parent::A->output(); TopLevel has each child stored, I have tried with parent but it results in same non-object. — Eric Samuel, Feb 18 '15 at 00:40
@EricSamuel : At least care to check ansewrs or we just wasted time reading and answering your question? — Pratik Joshi, Feb 20 '15 at 05:07
Ok, sorry. Tried to up click but I guess its the check. Thanks for the help. — Eric Samuel, Feb 21 '15 at 14:40

score 0 · Accepted Answer · edited May 23 '17 at 10:24

0

The answer is: No, the child class A cannot be accessed sideways. There is no direct inheritance between A and B.

The answer might be to typecast $this->A into an object of type B using a function like the one in the answer to this question:

How to Cast Objects in PHP

edited May 23 '17 at 10:24

Community

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answered Feb 18 '15 at 01:01

delatbabel

3,601
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score 0 · Answer 2 · answered Feb 18 '15 at 04:46

0

Make object of class A inside B and then call method of A as there is No parent child relationship between A , B.

   $objOfA = new A();
   $objOfA->output();

answered Feb 18 '15 at 04:46

Pratik Joshi

11,485
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PHP multiple child classes, accessing child class to class

2 Answers2