改进Request类的param方法

lang/zh-cn.php

@@ -45,6 +45,7 @@ return [
     'fields not exists'			=>	'数据表字段不存在',
     'where express error'		=>	'查询表达式错误',
     'no data to update'			=>	'没有任何数据需要更新',
+    'miss data to insert'       =>  '缺少需要写入的数据',
     'miss complex primary data'	=>	'缺少复合主键数据',
     'miss update condition'		=>	'缺少更新条件',
     'model data Not Found'		=>	'模型数据不存在',

library/think/Request.php

@@ -559,9 +559,10 @@ class Request
      * @access public
      * @param string|array $name 变量名
      * @param mixed $default 默认值
+     * @param string|array $filter 过滤方法     
      * @return mixed
      */
-    public function param($name = '', $default = null)
+    public function param($name = '', $default = null, $filter = null)
     {
         if(is_array($name)){
             // 设置param
@@ -587,11 +588,7 @@ class Request
             // 当前请求参数和URL地址中的参数合并
             $this->param = array_merge($this->get(), $vars);
         }
-        if ($name) {
-            return isset($this->param[$name]) ? $this->param[$name] : $default;
-        } else {
-            return $this->param;
-        }
+        return $this->input($this->param, $name, $default, $filter);
     }
 
     /**