初始化项目：添加后端代码、ThinkPHP框架、前端资源

application/common/library/cache/Clear.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace app\common\library\cache;
+use think\Cache;
+class Clear
+{
+    public static function course(){
+        Cache::clear(\app\common\constant\cache\Keys::COURSE_TAG);
+        Cache::clear(\app\common\constant\cache\Keys::PAGE_TAG);
+    }
+
+    public static function page(){
+        Cache::clear(\app\common\constant\cache\Keys::PAGE_TAG);
+    }
+}