title: AWS PHP SDK getting class not found fatal error
body: <p>I'm trying to read messages from my SQS but I can't get that far as I'm having trouble installing the PHP SDK.</p>
  
  <p>I followed the instructions and installed via composer. </p>
  
  <p>My code for testing purposes is:</p>
  
  <pre><code>require 'vendor/autoload.php';
  $sqs_credentials = array(
          'region' =&gt; 'us-west-2',
          'version' =&gt; 'latest',
          'credentials' =&gt; array(
              'key'    =&gt; '*****',
              'secret' =&gt; '**********',
          )
      );
  
      $sqs_client = new SqsClient($sqs_credentials);
  </code></pre>
  
  <p>This simply results in </p>
  
  <pre><code>Class 'SqsClient' not found in /var/www/html/sqs_test.php on line 10
  </code></pre>
  
  <p>I then tried by downloading the zip file directly and used</p>
  
  <pre><code>require 'aws/aws-autoloader.php';
  </code></pre>
  
  <p>This resulted in the exact same error. What am I doing wrong? I'm quite certain the path is accurate as I can output text directly on Sqs/SqsClient.php.</p>