关于继承的1点疑惑,希望大家可以帮帮忙

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Release: 2016-06-13 12:31:27
Original
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关于继承的一点疑惑,希望大家可以帮帮忙!
class f {
    private $str = "123";
    public function fun() {
         echo $this->str;
    }
}

class s extends f {
    public $str = "abc";
}

$s = new s();
$s->fun();
输出:123


class f {
    public $str = "123";
    public function fun() {
         echo $this->str;
    }
}

class s extends f {
    public $str = "abc";
}

$s = new s();
$s->fun();
输出:abc

第一个的输出很疑惑,为什么会输出父类的属性值?麻烦大家给我分析分析内存,有图说明更好,谢谢大家了。

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