如何在PHP中获取对象的属性

Question

I have an object that looks like this and has a This is a demo Variable property I want to access.

---

I have the object saved in a variable called kpi :

$kpi = new Kpi($item);

And now I want to access the variable, but doing the following returns null :

dd($kpi->demoVariable) // null

How do I access the properties I set in my constructor?

For reference, here is the constructor function:

public function __construct(Fuelconsumption $item)
{
    $this->demoVariable = 'This is a demo Variable';
}

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Edit:

I guess I would need to assign the properties to the attributes array, since it seems like laravel gets access to this array, by the above stated commands.

Answer 1

Just:

$kpi['demoVariable'];

Instead of

$kpi->demoVariable;