In what ways can using mod_rewrite to convert PHP files to HTML files impact the functionality of a PHP forum?

Converting PHP files to HTML files using mod_rewrite can impact the functionality of a PHP forum because the server will treat the files as static HTML, potentially breaking any dynamic PHP functionality within the forum. To solve this issue, you can exclude the PHP forum files from the mod_rewrite rule by adding a condition to skip rewriting URLs that point to the forum files.

RewriteEngine On
RewriteCond %{REQUEST_URI} !^/forum/.*\.php$
RewriteRule ^(.*)\.html$ $1.php [L]