This htaccess snippet is supposed to redirect




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...


  • 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, 2011 at 18:36
  • Just the one =/
    – qodeninja
    Jun 23, 2011 at 18:36

2 Answers 2


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]
  • Well I dont want all requests, I only need that specific URL redirected to another domain and not any others.
    – qodeninja
    Jun 23, 2011 at 18:33
  • @codeninja I have updated my answer. Redirect will work for that URL only.
    – LazyOne
    Jun 23, 2011 at 19:12
  • @LazyOne will this work with postname permalinks too? Thank you
    – panza
    Feb 1, 2017 at 23:08

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.

  • Hi, this is brilliant. Would this work for postname permalinks too?
    – panza
    Feb 1, 2017 at 22:58
  • Solution is great but it preview value is "truee" or "truenotsotrue", this thing still works when it shouldn't be. In other words, it doesn't match EXACT query string value
    – Suleman
    Feb 20, 2020 at 0:38

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