Is there a simple way to count items with new content?

Hi all,

I'm looking to implement a block which includes a link to a view showing all updated/new content since a users last visit. I have the view set up and working but I'd like the link to the view to say "X new posts since your last visit" where X is the actual number of items taken from the view.

Is there a php snippet I could use to generate this number or is it possible in some other way?

Thanks