PHP AWS SDK 3 Error: AWS HTTP error: cURL error 6: Could not resolve host: s3.oregon.amazonaws.com
<p>I'm trying to connect to an AWS version 3 SDK bucket.</p>

<p>But, I receive the below error:</p>

<blockquote>
  <p>PHP Fatal error:  Uncaught exception 'Aws\S3\Exception\S3Exception' with message 'Error executing "PutObject" on "<a href="https://s3.oregon.amazonaws.com/my-buekct-test/hello_world.txt" rel="noreferrer">https://s3.oregon.amazonaws.com/my-buekct-test/hello_world.txt</a>"; AWS HTTP error: cURL error 6: Could not resolve host: s3.oregon.amazonaws.com (see <a href="http://curl.haxx.se/libcurl/c/libcurl-errors.html" rel="noreferrer">http://curl.haxx.se/libcurl/c/libcurl-errors.html</a>)'</p>
</blockquote>

<p>This is my code, just simple.</p>

<pre><code>&lt;?php
header('Content-Type: text/plain; charset=utf-8');

// Include the SDK using the Composer autoloader
require 'vendor/autoload.php';

$s3 = new Aws\S3\S3Client([
'region'  =&gt; 'Oregon',
'version' =&gt; 'latest',
'credentials' =&gt; [
    'key'    =&gt; 'Enter the key',
    'secret' =&gt; 'Enter the Secret key'
]
]);

// Send a PutObject request and get the result object.
$key = 'hello_world.txt';

$result = $s3-&gt;putObject([
'Bucket' =&gt; 'my-buekct-test',
'Key'    =&gt; $key,
'Body'   =&gt; 'this is the body!'
]);

// Print the body of the result by indexing into the result object.
echo $result['Body'];
</code></pre>

<p>I'm using AWS centos, php 5.5.21, apache 2.4.10</p>

<p>Could you help point out where did I go wrong?</p>