编辑代码

<?php
    class Father {
        public $gender = "男";
        private $secret = "私房钱";
        protected $property = "大别墅";
    }

    $father = new Father();
    
    class Son extends Father {
        // private $secret = "成绩单";
        // protected $property = "苹果14";

        function say() {
            echo "我的财产是" .$this -> property;
            echo "我的秘密是" .$this -> secret;
        }
    }

    $son = new Son();

    echo $son -> gender;
    $son -> say();
?>