note 117559 added to language.constants.predefined

A little update on My previously submitted comment to complement the note by eyecatchup at gmail dot com. Magic constants can not be tested with defined($name) <?php if(!defined(__DIR__)){ //will not work } ?> when for example __DIR__ is not defined and you use it anyway php assumes you meant '__DIR__' and throws a notice. because of this assumption we can do: <?php if(@__DIR__ == '__DIR__'){ echo 'magic __DIR__ constant NOT defined'; /* insert this code where needed, remember __DIR__ is a MAGIC constant, it returns the directory name of the file from where __DIR__ is being refered to */ define('__DIR__', dirname(__FILE__)); /* the above define for __DIR__ is completely useless as the MAGIC will be lost, it will always, no matter where it's called from return the directory name of the file where __DIR__ the constant was defined. */ }echo{ echo 'magic __DIR__ constant IS defined'; } ?> ---- Server IP: 72.52.91.14 Probable Submitter: 89.20.95.34 ---- Manual Page -- http://php.net/manual/en/language.constants.predefined.php Edit -- https://master.php.net/note/edit/117559 Del: integrated -- https://master.php.net/note/delete/117559/integrated Del: useless -- https://master.php.net/note/delete/117559/useless Del: bad code -- https://master.php.net/note/delete/117559/bad+code Del: spam -- https://master.php.net/note/delete/117559/spam Del: non-english -- https://master.php.net/note/delete/117559/non-english Del: in docs -- https://master.php.net/note/delete/117559/in+docs Del: other reasons-- https://master.php.net/note/delete/117559 Reject -- https://master.php.net/note/reject/117559 Search -- https://master.php.net/manage/user-notes.php