How to Use RewriteCond BackReferencing %N

Question

I have the following rules in my httpd.conf

   RewriteEngine on
       RewriteBase /
       RewriteCond %{QUERY_STRING} password=* 
       RewriteCond %{QUERY_STRING} bi2=(.*) 
       RewriteCond %{REQUEST_URI}  /myGet.php(.*)$
       RewriteRule ^(.*)$  http://blog.myexample%1.com/$1

However, when I executed the Request URI

/myGet.php?password=john&bi2=67

I was redirected to

http://blog.myexample.com/myGet.php?password=john&bi2=67

instead of

http://blog.myexample67.com/myGet.php?password=john&bi2=67

It seems that %N for the RewriteCond BackReferencing is not working. Although $N is.

Answer 1

Alter the order or the RewriteCond directives so that the last directive is the one you want the information from:

RewriteCond %{QUERY_STRING} password=* 
RewriteCond %{REQUEST_URI}  /myGet.php(.*)$
RewriteCond %{QUERY_STRING} bi2=(.*)
RewriteRule ^(.*)$  http://blog.myexample%1.com/$1

But I rather suggest:

RewriteCond %{QUERY_STRING} password=
RewriteCond %{QUERY_STRING} bi2=([^&]*)
RewriteRule ^/myGet\.php.*$  http://blog.myexample%1.com$0