301 redirect

I want to redirect 403 to another domain.

IE: I have a program on another domain that has links to our site. The links are local for example:

about.php is on siteB but is not on siteA. I don't want to put full paths of the links in because when I update my navigation file I copy it from the other site to this one. I would rather htaccess do this:

if about.php does not exist 301 redirect to http://www.siteb.com/about.php

and do on. However, I do not want it to redirect on existing files for example index.php should not redirect.
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Robert SaylorSenior DeveloperAsked:
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hieloCommented:
try:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^/?(about).php$ http://www.siteb/$1.php [R=301,NC,L]
</IfModule>

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Robert SaylorSenior DeveloperAuthor Commented:
Anyway to not have to write out the filenames?

RewriteRule ^/?(*).php$ http://www.siteb/$1.php [R=301,NC,L]

Can I use a wildcard then exclude files that exists?
0
hieloCommented:
Try:
RewriteRule ^/?(.+)\.php$ http://www.siteb/$1.php [R=301,NC,L]
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Robert SaylorSenior DeveloperAuthor Commented:
THANK YOU saved me a bunch of time!!
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