CODEWITHSUNDEEP
phpinheritance
Lizard
Lizard

Reputation: 44992

PHP Inheritance

I have the following 3 classes :

class ParentClass {
    protected $myVar = array();

    function __construct() {
        var_dump($this->myVar);
    }
}

class FirstClass extends ParentClass {
    protected $myVar = array('defaultVal');
}

class SecondClass extends FirstClass {
    protected $myVar = array('anotherVal');
}

If I was to do the following:

$class = new SecondClass();

Then I would get array('anotherVal') what can I add to the construct of ParentClass so that I would actually get array('defaultVal', 'anotherVal')

Thanks in advance!

Upvotes: 0

Views: 162

Answers (4)

Lizard
Lizard

Reputation: 44992

After furthur research i found out an easy way to do it get_class_vars:

class ParentClass {
    protected $myVar = array();

    function __construct() {
        $firstClassVars = get_class_vars('FirstClass');
        $this->myVar= array_merge($this->myVar, $firstClassVars['myVar']);
        var_dump($this->myVar);
    }
}

This solves my problems...

Thanks anyway guys!

Upvotes: -1

Umang
Umang

Reputation: 5266

Using ideas from this page, I would suggest the following:

class ParentClass {
    protected $myVar = array();

    function __construct() {
        var_dump($this->myVar);
    }
}

class FirstClass extends ParentClass {
    function __construct() {
        array_unshift($this->myVar, "defaultVar");
        parent::__construct();
    }
}

class SecondClass extends FirstClass {
    function __construct() {
        array_unshift($this->myVar, "anotherVal");
        parent::__construct();
    }
}
$class = new ParentClass();
$class1 = new FirstClass();
$class2 = new SecondClass();

Which gives me the following output:

array(0) {
}
array(1) {
  [0]=>
  string(10) "defaultVar"
}
array(2) {
  [0]=>
  string(10) "defaultVar"
  [1]=>
  string(10) "anotherVal"
}

Upvotes: 0

ThePrimeagen
ThePrimeagen

Reputation: 4582

For some odd reason, stack overflow keeps erasing my previous answer. So here is the new one. 

class ParentClass {
    protected $myVar;

    function __construct() {
        $this->myVar = array();
    }
}

class FirstClass extends ParentClass {
    function __construct() {
        parent::__construct();
        $this->myVar[] = 'default val';
    }
}

class SecondClass extends FirstClass {
    function __construct() {
        parent::__construct();
        $this->myVar[] = 'another val';
    }

    public function printArr() {
        print_r($this->myVar);
    }
}

$class = new Secondclass();
$class->printArr();

Upvotes: 5

Justin ᚅᚔᚈᚄᚒᚔ
Justin ᚅᚔᚈᚄᚒᚔ

Reputation: 15369

Change your assignments to array_push().

Upvotes: 0

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