Yii::$app->request->post() 是不是取不到值

app-hd/controllers/MtController.php

@@ -58,6 +58,10 @@ class MtController extends BaseController
         if(!empty($get)) {
             Yii::info('cancelOrder: ' . json_encode($get));
         }
+        if(!empty($_POST)) {
+            Yii::info('cancelOrder: ' . json_encode($_POST));
+        }
+
         return;
     }
 }