useful htaccess stuffs

.htaccess

#single page redirects
Redirect 301 /oldpage.html http://www.yoursite.com/newpage.html
Redirect 301 /oldpage2.html http://www.yoursite.com/folder/

#entire site redirect
Redirect 301 / http://newsite.com/

#automatically append or prepend files 
php_value auto_prepend_file "/real/path/to/file/functions.php"
php_value auto_append_file "/real/path/to/file/footer.php"

#custom error docs
ErrorDocument 400 /400.html
ErrorDocument 401 /401.html
ErrorDocument 403 /403.html
ErrorDocument 404 /404.html
ErrorDocument 405 /405.html
ErrorDocument 408 /408.html
ErrorDocument 414 /414.html
ErrorDocument 500 /500.html
ErrorDocument 502 /502.html
ErrorDocument 504 /504.html

#change a directories index page
DirectoryIndex index2.html

#force downloads for a given filetype
AddType application/octet-stream .csv
AddType application/octet-stream .xls
AddType application/octet-stream .doc
AddType application/octet-stream .avi
AddType application/octet-stream .mpg
AddType application/octet-stream .mov
AddType application/octet-stream .pdf

#basic directory-based password protection
AuthType Basic
AuthName "This Area is Password Protected"
AuthUserFile /full/path/to/.htpasswd
Require valid-user
#next part goes in .htpasswd - get the pw from htaccesstools.com/htpasswd-generator
mikedugan:$apr1$OHaq/zuE$pY/DlOkPSxPTnxhSXxKzf0

# display no errs to user
php_flag display_startup_errors off
php_flag display_errors off
php_flag html_errors off
# log to file
php_flag log_errors on
php_value error_log /location/to/php_error.log

#prevents other sites from hotlinking to your images
RewriteEngine On
#duplicate the below to allow specific site or search engines etc
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?yourdomain\.com/ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteRule .*\.(jpg|gif|bmp|png)$ /images/dontsteal.jpg [L]

#allows you to use PHP in a JavaScript file
<FilesMatch "^.*?api.*?$">
SetHandler php5-script
</FilesMatch>
#add the following in the first line of the JS
header("Content-type: application/javascript");
#now use php tags as needed

#remove the www--make sure you have the cname record in your DNS!
RewriteEngine On
RewriteCond %{HTTP_HOST} !^your-site.com$ [NC]
RewriteRule ^(.*)$ http://your-site.com/$1 [L,R=301]