获取这个错误名称空间声明语句必须是脚本中的第一个语句 - getting this error Namespace declaration statement has to be the very first statement in the script

getting this error Namespace declaration statement has to be the very first statement in the script

得到这个错误:

命名空间声明语句必须是脚本中的第一个语句

在这段代码的最开始:

namespace app'controllers;
use yii'web'Controller;
use app'models'users;
class UserController extends Controller
{
     public function actionIndex()
     {
         echo "working on .....";
     }
}

您可能会出现此错误，因为您在<?php

后面有空格

 <?php
namespace app'controllers;
use yii'web'Controller;
use app'models'users;
class UserController extends Controller
{
     public function actionIndex()
     {
         echo "working on .....";
     }
}

直接删掉

<?php
namespace app'controllers;
use yii'web'Controller;
use app'models'users;
class UserController extends Controller
{
     public function actionIndex()
     {
         echo "working on .....";
     }
}

如果没有名称空间，您也会得到错误。要解决这个问题，请删除当前的PHP文件并重新创建它。这会解决问题的。