修正cache方法的变量规则检查位置

library/think/Request.php

@@ -1464,7 +1464,6 @@ class Request
      */
     public function cache($key, $expire = null)
     {
-        if (Cache::has($key)) {
         if (false !== strpos($key, ':')) {
             $param = $this->param();
             foreach ($param as $item => $val) {
@@ -1473,6 +1472,7 @@ class Request
                 }
             }
         }
+        if (Cache::has($key)) {
             // 读取缓存
             $content  = Cache::get($key);
             $response = Response::create($content)->header('Content-Type', Cache::get($key . '_header'));