Req #54683 [NEW]: $var = NULL; isset($var) return FALSE

From: Operating system: all PHP version: Irrelevant Package: *General Issues Bug Type: Feature/Change Request Bug description:$var = NULL; isset($var) return FALSE 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 bug report at http://bugs.php.net/bug.php?id=54683&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=54683&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=54683&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=54683&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=54683&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=54683&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=54683&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=54683&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=54683&r=needscript Try newer version: http://bugs.php.net/fix.php?id=54683&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=54683&r=support Expected behavior: http://bugs.php.net/fix.php?id=54683&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=54683&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=54683&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=54683&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54683&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=54683&r=dst IIS Stability: http://bugs.php.net/fix.php?id=54683&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=54683&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=54683&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=54683&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=54683&r=mysqlcfg