public function removeFileFromApplicationBucket($filename, $prefix)
{
ProjectConfiguration::registerAws();
$s3 = new AmazonS3();
$bucket = ProjectConfiguration::getApplicationAmazonBucketName();
if ($s3->if_bucket_exists($bucket)) {
$response = $s3->delete_object($bucket, $prefix . '/' . $filename);
if (!$response->isOK()) {
throw new Exception("Error deleting file!");
}
} else {
throw new Exception("Amazon bucket '{$bucket}' does not exist!");
}
return $response;
}