note 109257 added to function.defined

It should be noted that defined() does not work on magic constants; it will always* return bool(false). However, (re-)defining a magic constant will silently fail. As such the common work-around for defining the __DIR__ magic constant, for example, is unnecessary; it is simply enough to use the following, which will for all intents and purposes be ignored if using PHP 5.3+: <?php define('__DIR__', dirname('__FILE__')); ?> *Using defined() after re-defining a magic constant (which will fail silently) will return bool(true) -- although its value will be the default and not to whatever it was manually set. ---- Server IP: 69.147.83.197 Probable Submitter: 159.15.67.78 ---- Manual Page -- http://www.php.net/manual/en/function.defined.php Edit -- https://master.php.net/note/edit/109257 Del: integrated -- https://master.php.net/note/delete/109257/integrated Del: useless -- https://master.php.net/note/delete/109257/useless Del: bad code -- https://master.php.net/note/delete/109257/bad+code Del: spam -- https://master.php.net/note/delete/109257/spam Del: non-english -- https://master.php.net/note/delete/109257/non-english Del: in docs -- https://master.php.net/note/delete/109257/in+docs Del: other reasons-- https://master.php.net/note/delete/109257 Reject -- https://master.php.net/note/reject/109257 Search -- https://master.php.net/manage/user-notes.php