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diff --git "a/\346\235\216\345\256\266\347\216\262/20220517-\350\275\246.md" "b/\346\235\216\345\256\266\347\216\262/20220517-\350\275\246.md"
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@@ -0,0 +1,238 @@
+```php
+<?php
+/**
+ * Created by PhpStorm.
+ * User: acer
+ * Date: 2022/5/17
+ * Time: 22:56
+ */
+
+//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。
+
+class car{
+    private $brand;//品牌
+    private $price;//价格
+
+
+    public function  __construct($brand,$price)
+    {
+        $this->brand=$brand;
+        $this->price=$price;
+    }
+    function hao(){
+        echo $this->brand."的价格为：".$this->price;
+    }
+
+
+
+    /**
+     * @return mixed
+     */
+    public function getBrand()
+    {
+        return $this->brand;
+    }
+
+    /**
+     * @param mixed $brand
+     */
+    public function setBrand($brand)
+    {
+        $this->brand = $brand;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getPrice()
+    {
+        return $this->price;
+    }
+
+    /**
+     * @param mixed $price
+     */
+    public function setPrice($price)
+    {
+        $this->price = $price;
+    }
+}
+
+$ha=new car("奥迪","300000");
+$ha->hao();
+
+
+
+echo "<br>";
+//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 pao extends car{
+    private  $brand;//品牌
+    private $price;//价格
+
+
+    public function  __construct($brand,$price)
+    {
+        $this->brand=$brand;
+        $this->price=$price;
+    }
+    function jiu(){
+        echo $this->brand."的价格为：".$this->price;
+    }
+
+
+
+    /**
+     * @return mixed
+     */
+    public function getBrand()
+    {
+        return $this->brand;
+    }
+
+    /**
+     * @param mixed $brand
+     */
+    public function setBrand($brand)
+    {
+        $this->brand = $brand;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getPrice()
+    {
+        return $this->price;
+    }
+
+    /**
+     * @param mixed $price
+     */
+    public function setPrice($price)
+    {
+        $this->price = $price;
+    }
+}
+
+$y=new pao("奔驰","400000");
+$y->jiu();
+
+
+//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。
+//3个公共的属性和方法
+class shu
+{
+    public $a1;
+
+    public $a2;
+
+    pubLic $a3;
+
+    function name1()
+    {
+
+
+        echo "我叫" . $this->a1;
+    }
+
+    function age1()
+
+    {
+        echo "我" . $this->a2 . "岁了";
+    }
+
+    function love1()
+
+    {
+        echo "我的爱好是" . $this->a3;
+    }
+
+//3个受保护的属性和方法
+
+    protected $b1;
+
+    protected $b2;
+
+    protected $b3;
+
+    protected function name2()
+    {
+    }
+
+    protected function age2()
+
+    {
+        echo "我" . $this->a2 . "岁了";
+    }
+
+    protected function love2()
+
+    {
+        echo "我的爱好是" . $this->a3;
+    }
+
+
+    //3个私有属性和方法
+
+    private $c1;
+
+    private $c2;
+
+    private $c3;
+
+    private function name3()
+    {
+    }
+
+    private function age3()
+    {
+    }
+
+    private function love3()
+    {
+    }
+
+    public function getC1()
+
+    {
+        return $this->c1;
+    }
+
+
+    public function setC1($c1)
+    {
+
+        $this->c1 = $c1;
+    }
+
+
+    public function getC2()
+    {
+
+        return $this->c2;
+    }
+
+
+    public function setC2($c2)
+    {
+
+        $this->c2 = $c2;
+    }
+
+
+    public function getC3()
+    {
+
+        return $this->c3;
+    }
+
+
+    public function setC3($c3)
+    {
+
+        $this->c3 = $c3;
+
+    }
+}
+```
\ No newline at end of file