public static function getOssClient()
{
try {
$ossClient = new OssClient(getenv('OSS_ACCESS_KEY_ID'), getenv('OSS_ACCESS_KEY_SECRET'), getenv('OSS_ENDPOINT'), false);
} catch (OssException $e) {
printf(__FUNCTION__ . "creating OssClient instance: FAILED\n");
printf($e->getMessage() . "\n");
return null;
}
return $ossClient;
}