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This htaccess snippet is supposed to redirect

myhost.com/?p=1&preview=true

to

alt.myhost.com/?p=1&preview=true

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^myhost.com$ [NC]
RewriteRule ^/\?p=([0-9]+)&preview=true$ http://alt.myhost.com/?p=$1&preview=true [NC,R=301,L]

but for some reason I can't escape the / and ? part of the URL. Not sure why this isnt working...

I've tried escaping ?

\\? \? [?]

and I've tried escaping the /

\\/ \/ [/]

none of these seem to work either...

help!

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RewriteRule does not work with query strings (everything after ?) only with url path (which you basically do not have in your example). Are you trying to redirect ALL URLs from one domain to another or just this one? –  LazyOne Jun 13 '11 at 18:36
    
Just the one =/ –  qodeninja Jun 23 '11 at 18:36
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2 Answers

up vote 4 down vote accepted

This will redirect ALL requests from myhost.com to alt.myhost.com

RewriteCond %{HTTP_HOST} !^alt\.myhost\.com [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteRule ^/?(.*) http://alt.myhost.com/$1 [L,R,NE]

Code taken from official mod_rewrite manual

If for whatever reason the query string is not get preserved, replace the last line by

RewriteRule ^/?(.*) http://alt.myhost.com/$1 [L,R,NE,QSA]

UPDATE: This will redirect your specific URL to another domain:

RewriteCond %{HTTP_HOST} =myhost.com [NC]
RewriteCond %{QUERY_STRING} ^(p=1&preview=true)
RewriteRule ^$ http://alt.myhost.com/?%1 [R=301,L]
share|improve this answer
    
Well I dont want all requests, I only need that specific URL redirected to another domain and not any others. –  qodeninja Jun 23 '11 at 18:33
    
@codeninja I have updated my answer. Redirect will work for that URL only. –  LazyOne Jun 23 '11 at 19:12
    
thanks that did the trick! –  qodeninja Jul 7 '11 at 18:09
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Because of the query string "p=([0-9]+)&preview=true" I guess your need for a redirect is due to having wordpress admin on a subdomain and the website on your main domain.

Because of that you can't preview drafts.

I came up with a broader solution that also works with custom post types and plugins that add parameters:

RewriteCond %{HTTP_HOST} =myhost.com [NC]
RewriteCond %{QUERY_STRING} (preview=true)
RewriteRule ^$ http://alt.myhost.com/?%{QUERY_STRING} [R=301,L]

In plain english when "preview=true" is found in a query, the redirection happen to the alt subdomain and the full query is kept.

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