Managing multiple Domains / sub sites with MODx

RewriteRule ^(index\.(html?|php)|domain1-com)?(.*)$ index.php?q=/domain1/$3 [L,QSA]

RewriteRule ^(index\.(html?|php)|domain1-com)?(.*)$ index.php?q=/domain1-com/$3 [L,QSA]

RewriteRule ^(index\.(html?|php)|travel2spain-co-uk)?(.*)$ index.php?q=/travel2spain-co-uk/$3 [L,QSA]

# rewrite the homepage of each domain to index.html
RewriteRule ^travel2spain-co-uk/?(.*)$ /index.html [L]

RewriteRule ^travel2spain-co-uk/?(.*)$ /$1 [R=301,L]

/*####
#
#   Name: Homepage select and Redirect for multisite
#   Version: 0.1
#   Author: Marcel Bouwmeester
#
####*/
global $modx;
$table= $modx->getFullTableName('site_content');
$host_url = $_SERVER['HTTP_HOST'];
$host_url = $modx->db->escape($host_url);
$where = 'pagetitle = "'.$host_url.'"' . ' and parent="0"';
$result = $modx->db->select('id',$table,$where);
$row = $modx->db->getRow($result);
$home = $row['id'];
if ($home){
  $this->sendForward($home);
} 
return "";