You can perform the following operations on objects in a bucket:
Check whether an object exists (PHP SDK V1)
Manage file access permissions (PHP SDK V1)
Configure object metadata when you upload an object (OSS SDK for PHP 1.0)
List objects (PHP SDK V1)
Delete objects (PHP SDK V1)
Copy files (PHP SDK V1)
Restore files (PHP SDK V1)
Manage symbolic links (PHP SDK V1)
Enable MD5 validation (PHP SDK V1)