PHP受保護的類和私有類什么區別

受保護的繼承后可以訪問，私有的只能在該類中訪問，不會被繼承訪問
class Man{
    protected $name='lee';//受保護
    private    $age=123;//私有
    function __construct(){
        echo $this->name;//lee
        echo $this->age;//123

    }

}
class Girl extends Man{
    function __construct(){
        echo $this->name;//lee
        echo $this->age;//不會出現123,

    }

}

new Man();

new Girl();

<?php
class Man{
    protected $name='lee';//受保護
    private    $age=123;//私有
    function __construct(){
        echo $this->name;//lee
        echo $this->age;//123

    }

}
class Girl extends Man{
    function __construct(){
        echo $this->name;//lee
        echo $this->age;//不會出現123,

    }

}

new Man();

new Girl();