AmazonS3 PHP create object

gistfile1.php

include_once('application/libraries/aws/sdk.class.php');

		// Instantiate the AmazonS3 class
		$this->s3 = new AmazonS3();

		$bucket = '';

		$body = 'aaa';

		$response = $this->s3->create_object($bucket, $this->_feed, array(
			'body'        => gzencode($body, 9),
			'contentType' => 'application/json',
			'acl' => AmazonS3::ACL_PUBLIC,
			'headers' => array('Content-Encoding' => 'gzip')
		));

		// Success?
		if ( ! $response->isOK()) {
			$this->data['message'] .=  print_r($response, 1);
		}