note 86179 added to language.oop5.constants

A useful technique I've found is to use interfaces for package- or application-wide constants, making it easy to incorporate them into any classes that need access to them: <?php interface AppConstants { const FOOBAR = 'Hello, World.'; } class Example implements AppConstants { public function test() { echo self::FOOBAR; } } $obj = new Example(); $obj->test(); // outputs "Hello, world." ?> I realize the same could be done simply by defining the constant in a class and accessing it via "class_name::const_name", but I find this a little nicer in that the class declaration makes it immediately obvious that you accessing values from the implemented interface. ---- Server IP: 208.69.120.35 Probable Submitter: 70.104.68.128 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.constants.php Edit -- https://master.php.net/note/edit/86179 Del: integrated -- https://master.php.net/note/delete/86179/integrated Del: useless -- https://master.php.net/note/delete/86179/useless Del: bad code -- https://master.php.net/note/delete/86179/bad+code Del: spam -- https://master.php.net/note/delete/86179/spam Del: non-english -- https://master.php.net/note/delete/86179/non-english Del: in docs -- https://master.php.net/note/delete/86179/in+docs Del: other reasons-- https://master.php.net/note/delete/86179 Reject -- https://master.php.net/note/reject/86179 Search -- https://master.php.net/manage/user-notes.php