Bug #68162 [Opn->Csd]: isset($$varname) always true

Edit report at https://bugs.php.net/bug.php?id=68162&edit=1 ID: 68162 Updated by: nikic@php.net Reported by: pegasus at vaultwiki dot org Summary: isset($$varname) always true -Status: Open +Status: Closed Type: Bug Package: Scripting Engine problem Operating System: Centos 6 64-bit PHP Version: master-Git-2014-10-06 (Git) Block user comment: N Private report: N New Comment: Automatic comment on behalf of nikic Revision: http://git.php.net/?p=php-src.git;a=commit;h=e24c24c1087c6405e842fdd7afcd84b224eb75bf Log: Fix bug #68162: isset($$varname) always true Previous Comments: ------------------------------------------------------------------------ [2014-10-06 18:01:40] pegasus at vaultwiki dot org 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; #### ------------------------------------------------------------------------ [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