Constant suFBASE is used to create URL address to a page.
The constant contains host name and may contain reference to index.php file (if hideIndex is set to 0) and current language.
Example
<? echo '<a href="' . suFBASE . '/' . $suDOC['path'] . '">click to reload the page</a>'; // The link above could look like http://www.company.com/index.php/en/path if hideIndex is set to 0 // or http://www.company.com/en/path if hideIndex is enabled ?>