Gets whether or not the specified Amazon S3 object exists in the specified bucket.
AmazonS3 doesObjectExist
$s3 = new AmazonS3();
$bucket = 'my-bucket' . strtolower($s3->key);
$response = $s3->doesObjectExist($bucket, 'test1.txt');
// Success? (Boolean, not a CFResponse object)
var_dump($response);