A question about how the parent class method accesses the public property in the child class object

A question about how the parent class method accesses the public property in the child class object
：

------to solve the idea----------------------
Private $_name = ' Han '; is a private property of the parent class, so the child class cannot modify its value.
ShowName is the parent class method, so the parent class $_name = ' Korean '; Output.

Change private to protected or public.


------to solve the idea----------------------
You put Echo '
Class: '. Get_class ($this). ', method: '. __method__;
Change to Echo '
Class: '. __class__. ', method: '. __method__;
It can be seen from the results.

P1=10,_name= Kang
P1=10,_name= Han
Class: Han, method: Han::showname

Although Kong has inherited Han's method ShowName (__method__ for Han::showname)
But he still works in the Han category, so $this->_name is han::_name and always is.
If the han::_name is not private, then Kong::_name will overwrite the Han::_name
But it's not that $this->_name access is kong::_name, but it's still han::_name, but two is the same value.

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