WordPress at a glance
function is not described

documentation_link() WP 2.0.0

Deprecated in 2.5.0. It is no longer supported and can be removed in future releases. It is recommended to replace this function with the same one.

Unused Admin function.

No Hooks.

Return

Nothing (null).

Usage

documentation_link();

Code of documentation link: wp-admin/includes/deprecated.php WP 5.2.2

<?php
function documentation_link() {
	_deprecated_function( __FUNCTION__, '2.5.0' );
}