PHP change variable value in only one of multiple instances of a class

Question

I'm building a framework. I have a problem loading in multiple controllers, because they extend a base controller, where the instances are changed to the last loaded controllers options. How can i affect only the extended base controller of the controller class, that I'm currently working in, instead of affecting all instances of the base controller?

class loader
{
    private static $_inst;

    public function __construct($class) 
    {
        self::$_inst = $class;
    }
}

abstract class base_controller 
{
    protected $load;

    public function __construct() 
    {
        $this->load = new loader($this);
    }
}

class controller1 extends base_controller {}

class controller2 extends base_controller {}

When the first controller loads, it sets the instance in the loader. But when you load the second controller, it sets controller1's loader objects static $_inst to controller2's instance. Suggestions?

You are trying to dereference a null pointer at line 525.

Realitätsverlust
– Realitätsverlust

2014-03-04 12:04:02 +00:00
Commented Mar 4, 2014 at 12:04 — Realitätsverlust
– Realitätsverlust, Commented Mar 4, 2014 at 12:04
Do you use static properties in your base class?

Robin Webdev
– Robin Webdev

2014-03-04 12:06:38 +00:00
Commented Mar 4, 2014 at 12:06 — Robin Webdev
– Robin Webdev, Commented Mar 4, 2014 at 12:06

Akshay Kalose · Accepted Answer · 2014-03-04 14:14:38Z

1

$_inst will stay the same in all classes because you have defined it as static

Solution:

Just remove static and make it private $_inst;

answered Mar 4, 2014 at 14:14

Akshay Kalose

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1 Comment

Sune Over a year ago

The problem is, that if I remove static, it will make a recursion (loop), but thanks.

56ka · Accepted Answer · 2014-03-04 14:17:02Z

1

Static members are shared at the level of its declaration class. If you want an other comportment, you have to declare it in every children classes.

answered Mar 4, 2014 at 14:17

56ka

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