棘轮基本聊天应用程序给出错误“要求打开失败”

我正在尝试Ratchet库使用位于http://socketo.me/的WebSockets，但在Ubuntu中从命令行运行服务器脚本时遇到一些问题。

在成功安装composer和Ratchet之后，我在http://socketo.me/docs/hello-world上遵循基本聊天应用程序的教程，我在运行它的步骤。我的文件结构，websockets是我的项目文件夹，是:

kingsconflict
   websockets
      chat.php
      chat-server.php
      composer.json
      vendor
         autoload.php
         (dependecies included by composer for Ratchet)

当我输入"sudo php chat_server .php"时，我得到的错误是" php致命错误:require(): Failed opening required '/var/www/kingsconflict/vendor/autolload .php' (include_path='.:/usr/share/php:/usr/share/pear') in/var/www/kingsconflict/websockets/chat_server .php on line 5"。它似乎试图打开/var/www/kingsconflict/vendor/autolload .php，但实际路径是/var/www/kingsconflict/websockets/vendor/autolload .php，我不知道为什么它这样做。

chat-server.php

<?php
use Ratchet'Server'IoServer;
use MyApp'Chat;
    require dirname(__DIR__) . '/vendor/autoload.php';    // Error here
    $server = IoServer::factory(
        new Chat()
      , 8080
    );
    $server->run();

我试着用下面的行替换错误行，我停止得到错误，但我得到一个新的错误"PHP致命错误:类'MyApp'Chat'未找到"，这让我相信这个修复是不对的。

require ('./vendor/autoload.php');

其他文件的代码与棘轮教程中显示的相同，但以防万一，我将把它们贴在

chat.php

<?php
namespace MyApp;
use Ratchet'MessageComponentInterface;
use Ratchet'ConnectionInterface;
class Chat implements MessageComponentInterface {
    protected $clients;
    public function __construct() {
        $this->clients = new 'SplObjectStorage;
    }
    public function onOpen(ConnectionInterface $conn) {
        // Store the new connection to send messages to later
        $this->clients->attach($conn);
        echo "New connection! ({$conn->resourceId})'n";
    }
    public function onMessage(ConnectionInterface $from, $msg) {
        $numRecv = count($this->clients) - 1;
        echo sprintf('Connection %d sending message "%s" to %d other connection%s' . "'n"
            , $from->resourceId, $msg, $numRecv, $numRecv == 1 ? '' : 's');
        foreach ($this->clients as $client) {
            if ($from !== $client) {
                // The sender is not the receiver, send to each client connected
                $client->send($msg);
            }
        }
    }
    public function onClose(ConnectionInterface $conn) {
        // The connection is closed, remove it, as we can no longer send it messages
        $this->clients->detach($conn);
        echo "Connection {$conn->resourceId} has disconnected'n";
    }
    public function onError(ConnectionInterface $conn, 'Exception $e) {
        echo "An error has occurred: {$e->getMessage()}'n";
        $conn->close();
    }
}

composer.json

{
    "autoload": {
        "psr-0": {
            "MyApp": "src"
        }
    },
    "require": {
        "cboden/Ratchet": "0.2.*"
    }
}

autoload.php(没有编辑，但是管他呢)

<?php
// autoload.php generated by Composer
require_once __DIR__ . '/composer' . '/autoload_real.php';
return ComposerAutoloaderInit0964ef3a5e66723368300f04c3206ca1::getLoader();