From Joomla! Documentation
The "API17" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
|public||test||Method to test the username for uniqueness.|
- Defined in libraries/joomla/form/rules/username.php
- Extends JFormRule
jimport( 'joomla.form.rules.username' );