modrewrite in subfolder - php

Question

Just wanted to know if is possible to use mod_rewrite on a single(or more ) sub folder(s).
have a service in a folder that i would like to call like a rest service syntax .
$url = 'http://mysite/subfolder/parem1/parem2/parem3/';
$_SERVER['REQUEST_URI']
$tokens = explode('/', $url);
echo $tokens[sizeof($tokens)-2];
so the question is if I could catch all the different segments in a index.php in the subfolder, by using forexample modrewrite ( by placing a .htaccess with the rules only in this folder ? ) or how is it done ?
regards

Answer 1

If you want to define rewriting rules for a subfolder, take a look at RewriteBase
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /yoursubfolder
RewriteRule ^(.*)$ index.php?$param=$1
</IfModule>

Answer 2

It is possible. In your .htaccess, you could put something like this:
<IfModule mod_rewrite.c>
Options +FollowSymlinks
RewriteEngine On
RewriteRule ^([^/\.]+)/?$ index.php?p1=$1
RewriteRule ^([^/\.]+)/([^/\.]+)/?$ index.php?p1=$1&p2=$2
RewriteRule ^([^/\.]+)/([^/\.]+)/([^/\.]+)/?$ index.php?p1=$1&p2=$2&p3=$3
RewriteRule ^([^/\.]+)/([^/\.]+)/([^/\.]+)/([^/\.]+)/?$ index.php?p1=$1&p2=$2&p3=$3&p4=$4
</IfModule>
In your case you could just put the .htaccess file with the index.php in the folder where your service is located.
This way you can fetch (and sanitize) the $_GET array, instead of fetching the whole url.