Здравствуйте! Устанавливаю библиотеки и, наконец, уже дошло до того, чтобы начать это делать с composer.
Но на третьем шаге возникла проблема. Ниже принсткрин и описание. Все ли правильно я делаю на шаге 2?
Что не так в третьем шаге?
1) $ curl -sS https://getcomposer.org/installer | php
...
Composer (version 1.6.3) successfully installed to...
2)на втором шаге после $ php composer.phar require aws/aws-sdk-php
ответ

Using version ^2.8 for aws/aws-sdk-php
./composer.json has been created

Loading composer repositories with package information
Updating dependencies (including require-dev)
....
symfony/event-dispatcher suggests installing symfony/dependency-injection ()
symfony/event-dispatcher suggests installing symfony/http-kernel ()
guzzle/guzzle suggests installing guzzlehttp/guzzle (Guzzle 5 has moved to a new package name. The package you have installed, Guzzle 3, is deprecated.)
aws/aws-sdk-php suggests installing doctrine/cache (Adds support for caching of credentials and responses)
aws/aws-sdk-php suggests installing ext-apc (Allows service description opcode caching, request and response caching, and credentials caching)
aws/aws-sdk-php suggests installing monolog/monolog (Adds support for logging HTTP requests and responses)
aws/aws-sdk-php suggests installing symfony/yaml (Eases the ability to write manifests for creating jobs in AWS Import/Export)
Package guzzle/guzzle is abandoned, you should avoid using it. Use guzzlehttp/guzzle instead.
Writing lock file
Generating autoload files

3)третий шаг в инструкции
Require Composer's autoloader:

<?php
require 'vendor/autoload.php';

Но после ввода $ <?php
сразу ответ
-bash: ?php: No such file or directory