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c64a335884
在phpstorm2016.2.1中，使用下列语句会提示警告：
>Method __toString is not implemented for '\think\Request' less... (Ctrl+F1)
This inspection detects attempts to convert objects without __toString() method implementation to string, since PHP 5.2.0, it would cause E_RECOVERABLE_ERROR. "Check __toString exists for each expression type": if the option is on, the inspection will check all possible types of the expression and report if at least one ot them doesn't contain __toString() method implementation.
```
$request = Request::instance();
echo "当前模块名称是" . $request->module();// 这句会被IDE提示警告
echo "当前控制器名称是" . $request->controller();// 这句会被IDE提示警告
echo "当前操作名称是" . $request->action();// 这句就不会
```
后来发现是注释引起的问题，注释中有@return string|$this。而action()方法却写成@return string。个人认为应该统一写成@return string|Request 比较合适。学识短浅，仅供参考
```
/**
* 设置或者获取当前的模块名
* @access public
* @param string $module 模块名
* @return string|$this
*/
public function module($module = null)
```