Req #54683 [Opn->Bgs]: $var = NULL; isset($var) return FALSE

Edit report at https://bugs.php.net/bug.php?id=54683&edit=1 ID: 54683 Updated by: dsp@php.net Reported by: langpavel at phpskelet dot org Summary: $var = NULL; isset($var) return FALSE -Status: Open +Status: Bogus Type: Feature/Change Request Package: *General Issues Operating System: all PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Previous Comments: ------------------------------------------------------------------------ [2011-05-07 02:04:03] langpavel at phpskelet dot org Description: ------------ --- From manual page: http://www.php.net/function.isset#Description --- if valid variable $var with NULL value passed to isset(), result is FALSE. There should be language reserved word/language construct that behaves exactly like isset() except for NULL value. behavior of isset should be changed in future major release, optionally configurable by ini setting. If I create patch, do you include it? Note that if I'll go implement this, compatible behavior will be preserved. Test script: --------------- if(isset($var)) die('ERROR'); else echo "OK\n"; $var = null; if(!isset($var)) die('NOT GOOD. THIS IS UNCLEAR AND STRANGE'); else echo "THIS IS BETTER\n"; unset($var); if(isset($var)) die('ERROR'); else echo "OK\n"; Expected result: ---------------- OK THIS IS BETTER OK Actual result: -------------- OK NOT GOOD. THIS IS UNCLEAR AND STRANGE ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=54683&edit=1