.htaccess to rewrite /file to /folder/file.html, so I can have shorter urls

RewriteRule ^([^/]+)_([^/]+) /areas/$1_$2.html [NC]

<div>
<p>
Blah
</p>
</div>

<div>...</div>

RewriteRule ^([^/]+)_([^/]+) /area/$1_$2.html [NC]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
#RewriteRule Pattern Substitution [OptionalFlags]

RewriteRule ^(.*)\.html index.php?q=$1 [L,QSA] 

RewriteRule ^(.*)\.html index.php?q=$1 [L,QSA] 

RewriteRule ^(.*)$ index.php?q=$1 [L,QSA] 

RewriteRule ^([^/.]+)$ /test/$1 [NC]

RewriteEngine On
RewriteBase /

RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} ^domain\.com [NC]
RewriteRule (.*) http://www.domain.com/$1 [R=301,L]

RewriteRule ^([^/.]+)$ /test/$1.html [NC]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]

<?php
// should recognize shortened urls as valid if they are in specific directories that are in the top level - ie. only folder/FILE.html
// this way you can use folders somewhat like categories

// however, if you want the extension to be part of the shortened url, then take out anything to do with $extensions
// meaning if you want to shorten the url to www.domain.com/FILE.html, instead of www.domain.com/FILE

// this also doesn't work well with wayfinder because wayfinder will put in the 'folder' and the extension
// but the files can still be accessed through folder/FILE.html,
// just be careful because the search engines will see it as duplicate content

// will NOT work for  folder/subfolder/FILE.html

$alias = null;
$alias_check = array();
$folder_id = array(5);// the resource id(s) of the folder(s) that can be omitted from the url
$extensions = array('.html', '/');// the extensions to check

if($modx->_systemConfig['friendly_alias_urls'] == 1) 
{
	if ($modx->event->name == 'OnWebPageInit')
	{
		foreach($folder_id as $key => $value)
		{
			$folder_id = $value;
			
			$folder = $modx->getObject('modResource', array('id' => $folder_id) );
			$alias_folder = $folder->get('alias') .'/';
			
			// gets the FILE - the url the user is trying to request
			$alias = $modx->request->getResourceIdentifier('alias');
			
			foreach($extensions as $key => $value)
			{
				$alias_ext = $value;
				
				// builds the url to check
				$alias_check[] = $alias_folder . $alias . $alias_ext;
			}
		}
	}
}

if($alias)
{
	foreach($alias_check as $key => $value)
	{
		$alias_path = $value;
		$holder = $modx->aliasMap;
		
		// if 'folder/FILE.html' IS in the alias map or 'site tree'
		if( isset( $holder[ $alias_path ] ) )
		{
			// get the id of folder/FILE.html
			$actualDocId = $holder[ $alias_path ];
			
			// this will allow people to enter www.domain.com/FILE 
			// and instead of being a 404 error
			// it will load www.domain.com/folder/FILE.html
			// but show as www.domain.com/FILE
			
			// load the resource, but leave url as www.domain.com/FILE
			$modx->sendForward($actualDocId);
			
			exit();
		}
		
		// check as case-insensitive, just in case user didn't capitilize url correctly
		$alias_path = strtolower( $alias_path );
		$holder = array_change_key_case( $holder );
		
		// if 'folder/file.html' IS in the alias map or 'site tree'
		// then send error 404 because they didn't type url correctly - ie. case-sensative
		if( isset( $holder[ $alias_path ] ) )
		{
			// creates the http://www.domain.com/
			$holder_2 = $modx->placeholders;
			$base_url = $holder_2['site_url'];
			
			// get the id of folder/FILE.html
			$actualDocId = $holder[ $alias_path ];
			
			// get the resource, and then build the shortened url to forward to
			$file = $modx->getObject('modResource', array('id' => $actualDocId) );
			$url = $base_url . $file->get('alias');
			$modx->sendRedirect($url, 0, '', 'HTTP/1.0 301 Moved Permanently');
			
			exit();
		}
	}
}