Some content management systems have one entrance file e.g. index.php and depending on what comes after in the URL path, the system knows what data to pull.
My question is if search engines index "index.php" or whether they follow and index all of the contents of "index.php/path/to/page" as well?
Using the same principle, if I have a product page, but that page can bring up various categories via a query string e.g. index.php?page=electronics, index.php?page=toys can search engines reliably index the content of those "pages" if I have, for example, a menu that links to all those?