子类可以访问父类属性数据吗？

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.

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);
    }
}