We want to rename our *.html files to *.php but (sadly enough) have not enough knowledge to do it with a dos batchfile and/or cmd prompt command.

The problem is that each file is in seperat folder and yes talking about 1500+ different folder names. Using wildcards for the files I know is the '*' but using also a wildcard for folders is unknown to me. We probably need to use the (MSDOS) 'FOR' command but there I am stucked.

Folder structure we use is:
parent-folder/child-folder/grandchild-folder/file.html sample: games/A/game_name/file.html, games/B/game_name/file.html, games/C/game_name/file.html and so on.

The parent folder is for all files the same, the child & grandchild folders are different for most files.

After renaming these files to .php I assume following in the .htaccess will make a permanent redirect. RedirectMatch 301 (.).html$ http://oursite.com$1.php

Looking forward to suggestions/answers, thnx in advance.