Bug #73167 [NEW]: there is a bug in variable variables

From: karemmm21 at yahoo dot com Operating system: variable variables PHP version: 7.0.11 Package: *General Issues Bug Type: Bug Bug description:there is a bug in variable variables Description: ------------ $tirepr = 30; $name = substr("tireqty",0,-3); $xx = $name . "pr". "<br />"; echo $$xx; // the result is Notice: Undefined variable: tirepr Test script: --------------- $tirepr = "30"; $name = substr("tireqty",0,-3); $xx = $name . "pr". "<br />"; echo $$xx; // the result is Notice: Undefined variable: tirepr Expected result: ---------------- print 30 Actual result: -------------- Notice: Undefined variable: tirepr -- Edit bug report at https://bugs.php.net/bug.php?id=73167&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73167&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73167&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73167&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73167&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73167&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73167&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73167&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73167&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73167&r=support Expected behavior: https://bugs.php.net/fix.php?id=73167&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73167&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73167&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73167&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73167&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73167&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73167&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73167&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73167&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73167&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73167&r=mysqlcfg