<IfModule mod_rewrite.c>
	RewriteEngine On
	
	# replace /sub/ by your sub directory
	RewriteBase /sub/
	
	RewriteCond %{HTTP_HOST} ^[^.]+\.[^.]+$
	RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [L,R=301]
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteCond %{REQUEST_FILENAME} !-d
	
	# replace /sub/ by your sub directory
	RewriteRule . /sub/index.php [QSA,L]
	RewriteRule ^api/{REQUEST_FILENAME}$ api/
</IfModule>
