Append .php to URLs

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews
    </IfModule>

    #Turn on rewrite engine if available
    RewriteEngine On

    #We then rewrite URIs that does not end with .php and
    #do not point to existing files to their .php version
    RewriteCond %{REQUEST_URI} !^.*\.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ $1.php [L]

</IfModule>