Using PHP in Custom Dashboard Content Widget?

I want to encourage users to add a profile photo from the custom dashboard widget. However, when I try to add php to send users to change their avatar (ultimately to this link:
http://mysite/members/username/profile/change-avatar/) it just shows up blank or gives me a fatal error. Suggestions?

I just want to link them to the change-avatar page in BuddyPress from the dashboard widget.

Thanks!