This question has been answered by nuan88. See the first response.
<base href="[[!+site_url]]" />
<base href="/" />
[[!+site_url]]
<link rel="stylesheet" href="[[!++site_url]]css/filename.css" type="text/css">
# MODX supports Friendly URLs via this .htaccess file. You must serve web
# pages via Apache with mod_rewrite to use this functionality, and you must
# change the file name from ht.access to .htaccess.
#
# Make sure RewriteBase points to the directory where you installed MODX.
# E.g., "/modx" if your installation is in a "modx" subdirectory.
#
# You may choose to make your URLs non-case-sensitive by adding a NC directive
# to your rule: RewriteRule ^(.*)$ index.php?q=$1 [L,QSA,NC]
# Prevent Apache from serving .htaccess files:
<FilesMatch "^\.htaccess">
Order allow,deny
Deny from all
</FilesMatch>
# <IfModule mod_security.c>
# SecFilterEngine Off
# SecFilterScanPOST Off
# </IfModule>
Options All -Indexes
Options +FollowSymlinks
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} domain\.com [NC]
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://domain.com/$1 [R,L]
# The Friendly URLs part
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA,NC]
# Make sure .htc files are served with the proper MIME type, which is critical
# for XP SP2. Un-comment if your host allows htaccess MIME type overrides.
#AddType text/x-component .htc
# If your server is not already configured as such, the following directive
# should be uncommented in order to set PHP's register_globals option to OFF.
# This closes a major security hole that is abused by most XSS (cross-site
# scripting) attacks. For more information: http://php.net/register_globals
#
# To verify that this option has been set to OFF, open the Manager and choose
# Reports -> System Info and then click the phpinfo() link. Do a Find on Page
# for "register_globals". The Local Value should be OFF. If the Master Value
# is OFF then you do not need this directive here.
#
# IF REGISTER_GLOBALS DIRECTIVE CAUSES 500 INTERNAL SERVER ERRORS :
#
# Your server does not allow PHP directives to be set via .htaccess. In that
# case you must make this change in your php.ini file instead. If you are
# using a commercial web host, contact the administrators for assistance in
# doing this. Not all servers allow local php.ini files, and they should
# include all PHP configurations (not just this one), or you will effectively
# reset everything to PHP defaults. Consult www.php.net for more detailed
# information about setting PHP directives.
#php_flag register_globals Off
# For servers that support output compression, you should pick up a bit of
# speed by un-commenting the following lines.
#php_flag zlib.output_compression On
#php_value zlib.output_compression_level 5
# The following directives stop screen flicker in IE on CSS rollovers. If
# needed, un-comment the following rules. When they're in place, you may have
# to do a force-refresh in order to see changes in your designs.
#ExpiresActive On
#ExpiresByType image/gif A2592000
#ExpiresByType image/jpeg A2592000
#ExpiresByType image/png A2592000
#BrowserMatch "MSIE" brokenvary=1
#BrowserMatch "Mozilla/4.[0-9]{2}" brokenvary=1
#BrowserMatch "Opera" !brokenvary
#SetEnvIf brokenvary 1 force-no-vary
What does the combination of [[!+site_url]] and Friendly URLs enabled do to links within a MODX site?
<img src="assets/photo1.jpg" />
<img src="https://yoursite/com/assets/photo1.jpg" />
<a href=[[~12]]>Link Text</a>
Use Friendly URLs (friendly_urls): No
yoursite.com/index.php?id=12