WordPress Version: 4.6
/**
* Changes the current user by ID or name.
*
* Set $id to null and specify a name if you do not know a user's ID.
*
* @since 2.0.1
* @deprecated 3.0.0 Use wp_set_current_user()
* @see wp_set_current_user()
*
* @param int|null $id User ID.
* @param string $name Optional. The user's username
* @return WP_User returns wp_set_current_user()
*/
function set_current_user($id, $name = '')
{
_deprecated_function(__FUNCTION__, '3.0.0', 'wp_set_current_user()');
return wp_set_current_user($id, $name);
}