Apache2 RewriteRule 500 Internal Server Error - apache

Question

I'm attempting to rewrite my URL's and some are working but another (which is an extra directory level deep) produces a 500 internal server error. I'm not sure why this is happening and for various reasons am unable to turn on logging.
My .htaccess file looks like this:
Options +FollowSymLinks
RewriteEngine On
# Rewrite account/order.php
RewriteRule ^account/order/([a-z0-9]+)/.+$ /account/order.php?order_id=$1 [L]
# Rewrite advertiser.php
RewriteRule ^advertiser/([a-z0-9]+)/.+$ /advertiser.php?advertiser_id=$1 [L]
# Remove .php from URL
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php
The URL for the rewrite rule for advertiser.php might look like this: http://domain.com/advertiser/1234
This works just fine.
However, my rewrite rule for account/order.php doesn't. It produces a 500 error. The URL might look like this: http://domain.com/account/order/1234
The only difference that I can see is that the rewrite rule has another directory in it that the working one does not. What am I missing that might cause this error?
Thanks!

Answer 1

Not sure why you have extra .+ in the end of patterns. Try this code:
ErrorDocument 404 default
Options +FollowSymLinks
RewriteEngine On
# Rewrite account/order.php
RewriteRule ^account/order/([a-z0-9]+)/?$ account/order.php?order_id=$1 [L,QSA,NC]
# Rewrite advertiser.php
RewriteRule ^advertiser/([a-z0-9]+)/?$ advertiser.php?advertiser_id=$1 [L,QSA,NC]
# Remove .php from URL
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php [L]