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子类重写父类属性的有关问题。求解惑

Jun 13, 2016 pm 12:33 PM
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子类重写父类属性的问题。。。。求解惑

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<br />

<?php<br />

    /**<br />

     *  子类重写父类方法和属性<br />

     **/<br />

    class Employer<br />

    {<br />

        protected $sal=3000;<br />

        public function getSal()<br />

        {<br />

            return $this->sal;<br />

        }<br />

        <br />

    }<br />

<br />

    class Manager extends Employer<br />

    {<br />

        protected $sal=5000;<br />

        public function getParentSal()<br />

        {<br />

            return parent::getSal(); //调用父类方法 返回父类属性,为什么会是5000<br />

        }<br />

        public function getSal()<br />

        {<br />

            return $this->sal;<br />

        }<br />

    }<br />

    $manager = new Manager;<br />

    echo $manager->getParentSal().PHP_EOL;//5000 这是为什么也是5000呢,但是在5.3以下版本好像是3000,求解释????<br />

    echo $manager->getSal();//5000<br />

?><br />

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