* A post-proxy recieves 2 arguments, the filepath and the result of the operation.
* The return calue of the post-proxy will be used as the new result of the operation
* The operations that have a post-proxy are
- * file_get_contents, is_file, is_dir, file_exists, stat, is_readable, is_writable, filemtime, filectime, file_get_contents, getMimeType, hash, free_space and search
+ * file_get_contents, is_file, is_dir, file_exists, stat, is_readable, is_writable, fileatime, filemtime, filectime, file_get_contents, getMimeType, hash, fopen, free_space and search
*/
class OC_FileProxy{