diff --git "a/\344\270\201\344\275\263\344\274\266/20220517-PHP\351\235\242\345\220\221\345\257\271\350\261\241\344\275\234\344\270\232.md" "b/\344\270\201\344\275\263\344\274\266/20220517-PHP\351\235\242\345\220\221\345\257\271\350\261\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..5f54b9b001ae5b600bccce9d51087a26c99a7d1b
--- /dev/null
+++ "b/\344\270\201\344\275\263\344\274\266/20220517-PHP\351\235\242\345\220\221\345\257\271\350\261\241\344\275\234\344\270\232.md"
@@ -0,0 +1,108 @@
+```php
+<?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;//品牌
+    private $price;//价格
+
+
+    /**
+     * @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 = $price;
+    }
+
+
+    function show(){
+        echo "这是一辆".$this->Brand."它的价格是".$this->price."。";
+    }
+
+    function run(){
+        echo "它能跑";
+    }
+}
+class SuperCar extends Car
+{
+    function run(){
+        echo "它跑得飞快";
+    }
+
+}
+$a = new SuperCar();
+$a -> setBrand("嘟嘟");
+$a -> setPrice(1200000);
+$a ->show();
+$a ->run();
+//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，三个私有属性和方法
+
+class test{
+    public $name;
+    public $age;
+    public $sex;
+
+    public function show(){
+        echo "介绍";
+    }
+    public function run(){
+        echo "它能跑";
+    }
+    public function eat(){
+        echo "它能吃";
+    }
+    protected $nname;
+    protected $aage;
+    protected $ssex;
+
+    protected function sshow(){
+        echo "介绍";
+    }
+    protected function rrun(){
+        echo "它能跑";
+    }
+    protected function eeat(){
+        echo "它能吃";
+    }
+    //私有
+    private $snname;
+    private $saage;
+    private $sssex;
+
+    private function rsshow(){
+        echo "介绍";
+    }
+    private function rrrun(){
+        echo "它能跑";
+    }
+    private function eeeat(){
+        echo "它能吃";
+    }
+}
+```
\ No newline at end of file