问题
I need an htaccess which redirects if there is a ?(question mark) in the URL,
Some sample URL's,
mysite.com/?p=44
mysite.com/?m=44
mysite.com/?cat=44
mysite.com/index.php?cat=44
The question mark could be anywhere after the "/". It should work for with the "www" and without it as well.
If there is a question mark, it should go to newsite.com.
Since I'm new to htaccess I don't know how to go about it and new some help from you'll. Thanks.
回答1:
You can try this rule
RewriteEngine On
RewriteCond %{QUERY_STRING} ^(.+)$
RewriteRule ^ http://newsite.com/? [L,R=301]
If you are using Apache v2.4 you can use QSD flag instead of ? in your RewriteRule target URI
RewriteRule ^ http://newsite.com [L,R=301,QSD]
Description:
The %{QUERY_STRING} is special variable which contains query string part of the URI (e.g: var=123) And it doesn't contain ? because it already knows if ? is in the URI, it is part of query string %{QUERY_STRING}.
The ^(.+)$ is regex which says the query string in the URI must start ^ and end $ with containing any character . one or more time + within the () capturing group.
So this basically means if any query string appended to your URI the condition RewriteCond becomes truthy and the next line RewriteRule do its work to redirect to your new URL.
来源：https://stackoverflow.com/questions/24969396/ridirecting-to-a-site-when-there-is-a-question-mark-in-the-url