OK so I've found every rendition of this but not this specifically. So my urls are in this format
www.inspection.com/users/?action=register
I want to convert it to
www.inspection.com/users.php?action=register
Here's what I've got so far in my htaccess
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^[A-Za-z0-9]+/\?action=[A-Za-z0-9]+$ $1.php?action=$2 [L,QSA]
But error logs say RewriteRule: cannot compile regular expression
Main Goal: After the domain name is the reference to the file I want to call. So append php on the end of that string but keep the query parameters