note 28831 added to reserved

I may be about to appear stupid, since the manual is very large and I haven't read every word of it, but... I've yet to find any explanation of double underscore reserved words. There are only occasional references to __LINE__ and __FILE__ elsewhere, but no actual explanation I've figured out what __LINE__ and __FILE__ do, but what about __CLASS__ and __FUNCTION__? Shouldn't these "magic words" be described properly somewhere? -- http://www.php.net/manual/en/reserved.php http://master.php.net/manage/user-notes.php?action=edit+28831 http://master.php.net/manage/user-notes.php?action=delete+28831 http://master.php.net/manage/user-notes.php?action=reject+28831