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

Edit report at https://bugs.php.net/bug.php?id=68162&edit=1 ID: 68162 Comment by: pegasus at vaultwiki dot org Reported by: pegasus at vaultwiki dot org Summary: isset($$varname) always true Status: Open Type: Bug Package: Scripting Engine problem Operating System: Centos 6 64-bit PHP Version: master-Git-2014-10-06 (Git) Block user comment: N Private report: N New Comment: Strange. I thought I was going crazy for a bit, then I tried messing around with actually trying to use the arrays created by the test. The testWrapper above indeed works normally on its own, but add the following immediately after the foreach loop in testWrapper: #### $testvar1 = array_merge($testvar1, array()); $testvar2[] = true; #### Previous Comments: ------------------------------------------------------------------------ [2014-10-06 17:03:18] nikic@php.net I can't repro this. ------------------------------------------------------------------------ [2014-10-06 04:51:33] pegasus at vaultwiki dot org Description: ------------ It seems that isset (likely others like unset, empty, etc) cannot properly resolve variably-named variables and simply returns true. Test script: --------------- function testWrapper() { foreach (array( 'testvar1', 'testvar2' ) AS $varname) { if (!isset($$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 this bug report at https://bugs.php.net/bug.php?id=68162&edit=1