php class drip --- access modifiers public protected private

• public can be inherited, can external access (that is, instantiate the object can be accessed directly)
• protected protected, it can be inherited by subclasses and can not access external
• private inheritance, not even think about external access

? <PHP 
class Coach 
{ 
    public Master $ = "Zhang"; 
    protected Lover $ = "D cauldron"; 
    Private LoveGame $ = "SM"; 
    public Slogan function () 
    { 
        . echo "~ ha ~ Houhou" "\ n-"; 
    } 
} 

class the extends Coach CPC 
{ 
    public function the __construct () 
    { 
        // $ this-> = $ Master Master; 
        echo" is my master __ I love "$ this" $ this-> master .. ". . -> lover "__ like playing" "\ n-";.   # Description public protected attributes can be inherited from the parent class come
     } 
    public function self_introduce (name $, $ Age) 
    { 

        echo "My name IS Hello ~" $. ... name "this year Christina" $ age "\ n";
    }
}
$cpc = new cpc();
$cpc->slogan();
$ cpc-> self_introduce ( 'Chen Peichang', 21); 
echo $ CPC-> Master; # Description public property can be accessed by an external (ie, instantiate the object can directly access)
 >?

 Output:

My master is Zhang Ding cauldron __ __ I love love to play
Houhou ha ha ~ ~       # inherited slogan from the parent class () method
hello ~ my name is Christina Chen Peichang year 21  # subclasses self_introduce method

Zhang    # object directly access the parent class public property