When PHP files (or similar... HTML?) are involved, the user might want to choose between viewing the source code or viewing an executed/rendered version of that file.
It seems that the pre-existing user permissions such as "R: read" and "X: Execute" could/should serve this purpose; except that a decision needs to be made about how to handle a situation in which both permissions are granted the user. Do we give them a "view source" and "view rendered" action in the "actions" column? What is the default action (clicking the filename)?