PHP-OOP - Iterating through an object

Hi guys
I have the following object, and I want to know how to loop through it to get to FileName elements.

Thanks in advance


stdClass Object
(
[FileDataModel] => Array
(
[0] => FileDataModel Object
(
[FileData] =>
[FileFullName] =>
[FileName] => c:\Inbound\4\fnAck_Ack_1103_200751980.xml.0
)

[1] => FileDataModel Object
(
[FileData] =>
[FileFullName] =>
[FileName] => c:\Inbound\4\fnAck_Ack_1104_209137967.xml.0
)
)
)