note 83352 added to function.get-defined-constants

How to: only define a USER constant if it hasn't already been defined. <?php // fetch an array of all the defined constants $tDefinedConstantsArray = get_defined_constants(true); // define a user constant if it does not already exist // (i.e. does not exist as a KEY in the USER defined constants; within the defined contants array) if(array_key_exists('MY_CONSTANT', $tDefinedConstantsArray['user']) == false) { define("MY_CONSTANT", "some value"); } ?> ---- Server IP: 117.104.160.194 Probable Submitter: 218.185.56.178 ---- Manual Page -- http://www.php.net/manual/en/function.get-defined-constants.php Edit -- https://master.php.net/note/edit/83352 Del: integrated -- https://master.php.net/note/delete/83352/integrated Del: useless -- https://master.php.net/note/delete/83352/useless Del: bad code -- https://master.php.net/note/delete/83352/bad+code Del: spam -- https://master.php.net/note/delete/83352/spam Del: non-english -- https://master.php.net/note/delete/83352/non-english Del: in docs -- https://master.php.net/note/delete/83352/in+docs Del: other reasons-- https://master.php.net/note/delete/83352 Reject -- https://master.php.net/note/reject/83352 Search -- https://master.php.net/manage/user-notes.php