Is http://localhost/index.php/controller/action?var=val valid?

Some PHP MVC has the index.php for the front controller. Now, my question is, putting a slash / and action after the document index.php makes it a valid URL? Also, does /action?var=val means that action is a file, 开发者_JS百科not a directory? I'm really confused if I'll follow such URL format.

Thanks in advance!

It is a valid URL. In fact, with URL rewriting, pretty much anything can be a valid URL.

People often use the index.php/controller/action fallback if they can't rewrite the URL. It still works and they can access the URL used within PHP to still process it.