in php why does isn't work

Question

class GrandClass {
    public $data;
    public function __construct() {
        $this->someMethodInTheParentClass();
    }
    public function someMethodInTheParentClass() {
        $this->$data = 123456;
    }
}

class MyParent extends GrandClass{
    public function __construct() {
        parent::__construct();
    }
}

class Child extends MyParent {
    // public $data;
    public function __construct() {
        parent::__construct();
    }
    public function getData() {
        return $this->data; 
    }
}

$a = new Child();
var_dump($a->getData());

PHP Notice: Undefined variable: data in D:\test.php on line 7

PHP Fatal error: Cannot access empty property in D:\test.php on line 7

전창한 check the comments and answers and mark one as accepted.thanks — Alive to die - Anant, Aug 24 '16 at 06:53

score 4 · Accepted Answer · answered Aug 24 '16 at 06:42

4

update your function someMethodInTheParentClass with below using $this->data = 123456;

 public function someMethodInTheParentClass() {
        $this->data = 123456;
    }

answered Aug 24 '16 at 06:42

AmmyTech

738
4
10

Kamlesh Gupta · Answer 2 · 2016-08-24T06:49:32.200

2

Use  `$this->data = 123456; `instead of`  $this->$data = 123456;` in below function

public function someMethodInTheParentClass() {
        $this->data = 123456;
}

edited Aug 24 '16 at 06:49

answered Aug 24 '16 at 06:42

Kamlesh Gupta

505
3
17

You might wanna flesh out your answer a little if you can, and perhaps format your answer a bit :) – Epodax Aug 24 '16 at 06:43

score 0 · Answer 3 · answered Aug 24 '16 at 06:53

0

Constructors in MyParent and Child classes are unnecessary.

answered Aug 24 '16 at 06:53

Vuer

149
6

in php why does isn't work

3 Answers3