Bug #68162 [NEW]: isset($$varname) always true

From: pegasus at vaultwiki dot org Operating system: Centos 6 64-bit PHP version: master-Git-2014-10-06 (Git) Package: Scripting Engine problem Bug Type: Bug Bug description:isset($$varname) always true Description: ------------ It seems that isset (likely others like unset, empty, etc) cannot properly resolve variably-named variables and simply returns true. Test script: --------------- function testWrapper() { foreach (array( 'testvar1', 'testvar2' ) AS $varname) { if (!isset($$varname)) { echo "\nSetting $varname\n"; $$varname = array(); } var_dump($$varname); } } testWrapper(); Expected result: ---------------- Setting testvar1 array(0) {} Setting testvar2 array(0) {} Actual result: -------------- NULL NULL -- Edit bug report at https://bugs.php.net/bug.php?id=68162&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68162&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68162&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68162&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=68162&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=68162&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=68162&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=68162&r=needscript Try newer version: https://bugs.php.net/fix.php?id=68162&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=68162&r=support Expected behavior: https://bugs.php.net/fix.php?id=68162&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=68162&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=68162&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=68162&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68162&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=68162&r=dst IIS Stability: https://bugs.php.net/fix.php?id=68162&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=68162&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=68162&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=68162&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=68162&r=mysqlcfg