子类可以访问父类属性数据吗？

Question

I have a child class extending a parent class.

In my parent class have a protected property that stores config data. In the parent class this property has all the configuration files needed.

But in the child class I cannot access that data. How can I bring over the config property data into the child class?

I am using

class Child extends Parent
{
    public function __construct()
    {
        print_r($this->config);
    }
}

but i get an empty response.

Answer 1

Unless the resource is Private you can

There are basically to ways to access the parent resource:

1. parent::{resource identifier}; eg. parent::config;
2. $this -> {resource identifier}; Unless the resource is overridden

---

Now, coming to the part, of which might cause this issue.

The parent constructor might need to run, in order to store the configuration. SO,

class Child extends Parent
{
    public function __construct()
    {
        parent::__construct();
        print_r($this->config);
    }
}