Definition
Webroot
The webroot (or document root) is the filesystem directory from which a web server serves files. A request for a path is resolved by appending the URL path to the webroot.
For example, if
index.phplives at/var/www/htdocs/index.php, then/var/www/htdocs/is the webroot. This is the directory the server must not let a user escape via a path traversal attack.