diff --git "a/\346\235\250\351\221\253\344\273\252/20220517-php\345\257\271\350\261\241.md" "b/\346\235\250\351\221\253\344\273\252/20220517-php\345\257\271\350\261\241.md"
new file mode 100644
index 0000000000000000000000000000000000000000..c545089e4350d7be9d20e62a8378e961e756453d
--- /dev/null
+++ "b/\346\235\250\351\221\253\344\273\252/20220517-php\345\257\271\350\261\241.md"
@@ -0,0 +1,106 @@
+```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。
+class car{//汽车
+var $kind;
+var $price;
+function __construct($kind,$price){
+    $this->kind=$kind;
+    $this->price=$price;
+}
+}
+$a =new car("宝马","30万");
+echo "这辆车是：".$a->kind."，它的价格是：".$a->price;
+echo "<hr>";
+//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 roadster extends car{//跑车
+var $speed;
+function __construct($kind,$price,$speed){
+    $this->kind=$kind;
+    $this->price=$price;
+    $this->speed=$speed;
+}
+
+}
+$b =new roadster("劳斯莱斯","120万","140");
+echo "这辆车的品牌为：".$b->kind."，价格为：".$b->price."，速度".$b->speed;
+echo "<hr>";
+//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 cat{
+    public $name;
+    public $kind;
+    public $color;
+    public function eat(){
+        echo "它会吃饭";
+    }
+    public function sleep(){
+        echo "它会睡觉";
+    }
+    public  function run(){
+        echo "它会跑";
+    }
+
+    private $weight;
+    private $tall;
+    private $sex;
+    /**
+     * @return mixed
+     */
+    public function getWeight()
+    {
+        return $this->weight;
+    }
+    
+    /**
+     * @param mixed $weight
+     */
+    public function setWeight($weight): void
+    {
+        $this->weight = $weight;
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getTall()
+    {
+        return $this->tall;
+    }
+    
+    /**
+     * @param mixed $tall
+     */
+    public function setTall($tall): void
+    {
+        $this->tall = $tall;
+    }
+    
+    /**
+     * @return mixed
+     */
+    public function getSex()
+    {
+        return $this->sex;
+    }
+    
+    /**
+     * @param mixed $sex
+     */
+    public function setSex($sex): void
+    {
+        $this->sex = $sex;
+    }
+  
+    private function climb{
+        echo "会爬树";
+    }
+    private function bite{
+        echo "会咬人";
+    }
+    private function drink{
+        echo "会喝水";
+    }
+
+}
+```
+