htaccess load resources from directory - web-services

Question

I want to make a htaccess RewriteRule with a RewriteCond
What I have so far:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^(sql.site.ro)$
RewriteRule ^(.*)$ ro-site-sql/index.php?x=$1
I want all requests sent to sql.site.ro to be served from the /ro-site-sql directory.
So if the URI is sql.site.ro/index.php the server will go to /ro-site-sql/index.php, or if URI is sql.site.ro/images/small/9954.png the server will go to /ro-site-sql/images/small/9954.png.
The problem is that if I make
RewriteCond %{HTTP_HOST} ^(sql.site.ro)$
RewriteRule ^(.*)$ ro-site-sql/$1
I get an Internal Server Error, and if I make
RewriteCond %{HTTP_HOST} ^(sql.site.ro)$
RewriteRule ^(.*)$ ro-site-sql/index.php?x=$1
I get Array ( [x] => ro-site-sql/index.php ) inside of /ro-site-sql/index.php. Should it not be just index.php, without the ro-site-sql/ part?
Thanks!

Answer 1

RewriteCond %{HTTP_HOST} ^sql.site.ro$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 ^(\w+/)+\w+\.\w+$
RewriteRule ^(.*)$ ro-site-sql/$1 [L,QSA]
RewriteCond %{HTTP_HOST} ^sql.site.ro$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(\w+/)+\w+\.\w+$
RewriteRule ^(.*)$ ro-site-sql/index.php?x=$1 [L,QSA]
This should work to identify actual files and access those and pass anything else to index.php.

Answer 2

The rewrite engine loops over .htaccess files until no more substitutions occur. You need to ensure that this loop stops after the first replacement. There are various ways to do this. Perhaps the easiest to understand is:
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^(sql.site.ro)$
RewriteCond $1 !index.php$
RewriteRule ^(.*)$ ro-site-sql/index.php?x=$1 [L,QSA]
Add the [L] flag because this is the last rule on this cycle and [QSA] if you also have other parameters sometimes.