收到此错误命名空间声明语句必须在脚本中的第一个声明

Question

得到这个错误：

Namespace declaration statement has to be the very first statement in the script

在此代码的最开始：

namespace app\controllers; 
use yii\web\Controller; 
use app\models\users; 

class UserController extends Controller 
{ 
    public function actionIndex() 
    { 
     echo "working on ....."; 
    } 
} 

Answer 1

你可能有这样的错误，因为你有后<?php

<?php 
namespace app\controllers; 
use yii\web\Controller; 
use app\models\users; 

class UserController extends Controller 
{ 
    public function actionIndex() 
    { 
     echo "working on ....."; 
    } 
} 

一个blankspace只需把它删掉

<?php 
namespace app\controllers; 
use yii\web\Controller; 
use app\models\users; 

class UserController extends Controller 
{ 
    public function actionIndex() 
    { 
     echo "working on ....."; 
    } 
}