301 редиректы на все случаи жизни

К данной теме приходится обращатся довольно часто, и все нужные в работе правила и хаки я соберу в одном месте. Охватить все, конечно-же, не удастся, но самое нужное я опишу.
Итак, пожалуйста.

#Редирект для одной отдельной страницы:
Redirect 301 /pagename.php http://www.domain.com/pagename.html

#Редирект всего сайта на главную другого домена:
Redirect 301 / http://www.domain.com/

#Редирект всего сайта на папку в другом домене
Redirect 301 / http://www.domain.com/subfolder/

#Редирект всех урлов директории на другой домен
Redirect 301 /subfolder http://www.domain.com/

#Редирект всех урлов с расширением .html на тот же адрес, но с расширением php
RedirectMatch 301 (.*)\.html$ http://www.domain.com$1.php

##
#Редиректы, используя правила rewrite
##

#Редирект домена на другой (постранично)
RewriteEngine on
RewriteBase /
RewriteRule (.*) http://www.newdomain.com/$1 [R=301,L]

#Редирект домена на другой с помощью PHP


 $ref=$_SERVER['QUERY_STRING'];
 $uri=$_SERVER['REQUEST_URI'];
 if ($ref!='') $ref='?'.$ref;
 header('HTTP/1.1 301 Moved Permanently');
 header('Location: http://fotohay.com.ua'.$uri);
 exit();

#Redirect to www location
RewriteEngine on
RewriteBase /
rewritecond %{http_host} ^domain.com [nc]
rewriterule ^(.*)$ http://www.domain.com/$1 [r=301,nc]

#Redirect to www location with subdirectory
RewriteEngine on
RewriteBase /
RewriteCond %{HTTP_HOST} domain.com [NC]
RewriteRule ^(.*)$ http://www.domain.com/directory/index.html [R=301,NC]

#Redirect from old domain to new domain with full path and query string:
Options +FollowSymLinks
RewriteEngine On
RewriteRule ^(.*) http://www.newdomain.com%{REQUEST_URI} [R=302,NC]

#Redirect from old domain with subdirectory to new domain w/o subdirectory including full path and query string:
Options +FollowSymLinks
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/subdirname/(.*)$
RewriteRule ^(.*) http://www.katcode.com/%1 [R=302,NC]

Rewrite and redirect URLs with query parameters (files placed in root directory)

Original URL:

http://www.example.com/index.php?id=1
Desired destination URL:

http://www.example.com/path-to-new-location/
.htaccess syntax:

RewriteEngine on
RewriteCond %{QUERY_STRING} id=1
RewriteRule ^index\.php$ /path-to-new-location/? [L,R=301]

Redirect URLs with query parameters (files placed in subdirectory)

Original URL:

http://www.example.com/sub-dir/index.php?id=1
Desired destination URL:

http://www.example.com/path-to-new-location/
.htaccess syntax:

RewriteEngine on
RewriteCond %{QUERY_STRING} id=1
RewriteRule ^sub-dir/index\.php$ /path-to-new-location/? [L,R=301]

Redirect one clean URL to a new clean URL

Original URL:

http://www.example.com/old-page/
Desired destination URL:
http://www.example.com/new-page/
.htaccess syntax:

RewriteEngine On
RewriteRule ^old-page/?$ $1/new-page$2 [R=301,L]

Rewrite and redirect URLs with query parameter to directory based structure, retaining query string in URL root level

Original URL:

http://www.example.com/index.php?id=100
Desired destination URL:

http://www.example.com/100/
.htaccess syntax:

RewriteEngine On
RewriteRule ^([^/d]+)/?$ index.php?id=$1 [QSA]

Rewrite URLs with query parameter to directory based structure, retaining query string parameter in URL subdirectory

Original URL:
http://www.example.com/index.php?category=fish
Desired destination URL:
http://www.example.com/category/fish/
.htaccess syntax:

RewriteEngine On
RewriteRule ^/?category/([^/d]+)/?$ index.php?category=$1 [L,QSA]
Domain change – redirect all incoming request from old to new domain (retain path)

RewriteEngine on
RewriteCond %{HTTP_HOST} ^example-old\.com$ [NC]
RewriteRule ^(.*)$ http://www.example-new.com/$1 [R=301,L]
If you do not want to pass the path in the request to the new domain, change the last row to:

RewriteRule ^(.*)$ http://www.example-new.com/ [R=301,L]

#Редирект поддомена на папку в основном домене, пример: blog.oldsite.com -> www.somewhere.com/blog/
retains path and query, and eliminates xtra blog path if domain is blog.oldsite.com/blog/
Options +FollowSymLinks
RewriteEngine On
RewriteCond %{REQUEST_URI}/ blog
RewriteRule ^(.*) http://www.somewhere.com/%{REQUEST_URI} [R=302,NC]
RewriteRule ^(.*) http://www.somewhere.com/blog/%{REQUEST_URI} [R=302,NC]