Bug #80161 [NEW]: Iterating on key/value with reference (&) has unexpected side effect

From: g dot passault at gmail dot com Operating system: Linux (Ubuntu 18.04) PHP version: 7.4.10 Package: Arrays related Bug Type: Bug Bug description:Iterating on key/value with reference (&) has unexpected side effect Description: ------------ For some reason, walking an array using keys and reference values (&), even without doing anything with it and then walking it has an influence if and only if the variable name is the same in both cases Test script: --------------- <?php $array = [ 'x' => 1, 'y' => 2, 'z' => 3 ]; // This useless walk has an effect on below walk foreach ($array as &$item) {} // This will show 1 2 2 instead of 1 2 3 // If you use another name for $item variable, it will show 1 2 3 foreach ($array as $item) { echo $item."\n"; } Expected result: ---------------- 1 2 3 Actual result: -------------- 1 2 2 -- Edit bug report at https://bugs.php.net/bug.php?id=80161&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80161&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80161&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80161&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80161&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80161&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80161&r=support Expected behavior: https://bugs.php.net/fix.php?id=80161&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80161&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80161&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80161&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80161&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80161&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80161&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80161&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80161&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80161&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80161&r=mysqlcfg