.htaccess rewrite rules?

[Josh]

I am using this .ntaccess rewrite rule to prettify the documentation URLs:

RewriteRule "^learn/(.+)$" "learn.php?page=$1"

This makes it so the URL "https://www.ultraengine.com/learn/Entity" gets treated as "https://www.ultraengine.com/learn?page=Entity".

However, if I have trailing arguments like "?lang=lua" they get omitted from the redirected URL. How can I add those into the rewrite rule? I want to use a URL like this:
https://www.ultraengine.com/learn/Entity?lang=lua

[Josh]

This works:

RewriteCond %{QUERY_STRING} ^lang=lua$
RewriteRule "^learn/(.+)$" "learn.php?page=$1&lang=lua"

RewriteCond %{QUERY_STRING} ^lang=cs
RewriteRule "^learn/(.+)$" "learn.php?page=$1&lang=cs"

RewriteCond %{QUERY_STRING} ^lang=cpp
RewriteRule "^learn/(.+)$" "learn.php?page=$1&lang=cpp"

RewriteRule "^learn/(.+)$" "learn.php?page=$1"

 

[Josh]

Example:
https://www.ultraengine.com/learn/LoadMaterial?lang=lua

[IceBurger]

You could instead use the QSA flag, like this: 

RewriteRule "^learn/(.+)$" "learn.php?page=$1" [QSA]