收到此錯誤命名空間聲明語句必須在腳本中的第一個聲明

Question

得到這個錯誤：

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

在此代碼的最開始：

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

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

Answer 1

你可能有這樣的錯誤，因爲你有後<?php

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

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

一個blankspace只需把它刪掉

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

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