Update Media Title

Hi,

I am trying to write a piece of code that update the title and description of an image using PHP.

Currently I have some code that retrieves the image for a specific post and checks if the title is set, if it is not then I would like to add a title.

However I can not the relevant function or example of how this can be done.

If anyone can point me in the right direction I would be grateful.

Thank you in advance,
cs1h