# .htaccess

.htaccess is the file the Apache web server looks in for directory-specific directives. It is very powerful. It can rewrite and redirect URLs, serve error documents, and do many other things.

## examples

Rewrite 'foo' to 'foo.html':

    RewriteEngine On
    RewriteRule ^foo$ foo.html

Add '.html' to all letter-only URLs:

    RewriteEngine On
    RewriteRule ^([a-z]*)$ $1.html

Don't apply subsequent rules if the requested filename is a directory:

    RewriteCond %{REQUEST_FILENAME} !-d

Don't apply subsequent rules if the requested filename is a file:

    RewriteCond %{REQUEST_FILENAME} !-f

Pass parameters ("query string"):

    RewriteEngineOn
    RewriteRule ^([a-z]*)$ $1.php [QSA]

Serve 404 page:

    ErrorDocument 404 404.html

## more information

Introduction: http://codular.com/htaccess-introduction
In depth: http://www.askapache.com/htaccess/htaccess.html