mod_rewrite: strip away subdomain and convert to URL parameter

Question

I have a web app, where I keep a subdomain for every client eg: http://clientNo32.myApp.com Due to some server hazzling I have to forward this stuff to my new server at http

Answer 1

I think you're trying to do something like this?

RewriteEngine On

# Don't know if you need this, exclude www hosts
RewriteCond %{HTTP_HOST} !^www [NC]

# Make sure we don't already have a "cId" in the query string
RewriteCond %{QUERY_STRING} !cId=

# match the subdomain
RewriteCond %{HTTP_HOST} ^([^\.]+)\.myapp.com$ [NC]

# add subdomain to URI as a query string
RewriteRule ^(.*)$ /app/index.php?cId=%1 [L,QSA]

This makes it so when you request anything starting with http://clientNo32.myApp.com/, it gets rewritten to /app/index.php?cId=clientNo32