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@@ -0,0 +1,126 @@
+````php
+//1、	写一段代码，定义一个汽车类，有品牌与价格两种属性。并为类实例化对象，为对象的属性赋值并引用。
+//2、	在上例的基础上为汽车类定义一个子类——跑车类。为子类实例化对象并访问父类的属性。
+
+class car{
+    private $brand;
+    private $price;
+
+
+    function __construct($brand,$price){
+        $this->brand=$brand;
+        $this->price=$price;
+    }//魔术构造
+
+//    function cars(){
+//        echo $this->brand.$this->price;
+//    }
+
+
+    /**
+     * @return mixed
+     */
+    public function getPrice()
+    {
+        return $this->price;
+    }
+    
+    /**
+     * @param mixed $price
+     */
+    public function setPrice($price)
+    {
+        $this->price = $price;
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getBrand()
+    {
+        return $this->brand;
+    }
+    
+    /**
+     * @param mixed $brand
+     */
+    public function setBrand($brand)
+    {
+        $this->brand = $brand;
+    }
+
+}
+
+
+$masha=new car("玛莎拉蒂",133333);
+
+$a="我有一辆豪车，它是一辆".$masha->getBrand()."，它的价格为".$masha->getPrice()."刀";
+echo $a;
+echo "\t\t";
+
+
+class paocar extends car{
+     function __construct($brand, $price)
+    {
+       parent::__construct($brand, $price);
+     }
+
+    function run(){
+        echo "我有一辆跑车它会跑，它是一辆";
+    }
+
+}
+
+
+$fll=new paocar("法拉利",223333);
+
+echo $fll->run();
+echo $fll->getBrand().",它的价格为：".$fll->getPrice()."刀";
+````
+
+
+
+
+
+
+
+
+
+
+
+```php
+//3、    定义一个类，分别定义3个公共的属性和方法，3个受保护的属性和方法，3个私有属性和方法。
+class dog{
+    public $name;
+    public $age;
+    public $sex;
+
+    protected $color;
+    protected $run;
+    protected $sleep;
+
+    private $vars;
+    private $length;
+    private $character;
+
+   public function eat(){
+        echo "它吃狗粮";
+    }
+    public function drunk(){
+        echo "它喝牛奶";
+    }
+   public function la(){
+        echo "它会自己上厕所";
+    }
+
+
+    protected function color(){}
+    protected function run(){}
+    protected function sleep(){}
+
+    private function vars(){}
+    private function length(){}
+    private function character(){
+   }
+}
+```
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