Bug #80826 [NEW]: Array member reference affecting pass by value assignment

From: tshumbeo at mailhouse dot biz Operating system: Windows & Linux PHP version: 7.4.15 Package: *General Issues Bug Type: Bug Bug description:Array member reference affecting pass by value assignment Description: ------------ See the test script. When (1) is not present (leaving the member reference in the outside scope when f() is called), the assignment inside f() is able to modify the passed array even though it doesn't accept it by reference (note "&array(1)" in Actual Result). Removing the reference explicitly with (1) avoids this problem. Test script: --------------- <?php $a = [1, 2, 3]; foreach ($a as &$reference) { $reference = (object) ['x' => $reference]; } // (1) //unset($reference); f($a); var_dump($a); function f($a) { foreach ($a as $k => $v) { $a[$k] = [$v]; } } Expected result: ---------------- array(3) { [0]=> object(stdClass)#1 (1) { ["x"]=> int(1) } [1]=> object(stdClass)#2 (1) { ["x"]=> int(2) } [2]=> object(stdClass)#3 (1) { ["x"]=> int(3) } } Actual result: -------------- array(3) { [0]=> object(stdClass)#1 (1) { ["x"]=> int(1) } [1]=> object(stdClass)#2 (1) { ["x"]=> int(2) } [2]=> &array(1) { // !!! [0]=> object(stdClass)#3 (1) { ["x"]=> int(3) } } } -- Edit bug report at https://bugs.php.net/bug.php?id=80826&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80826&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80826&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80826&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80826&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80826&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80826&r=support Expected behavior: https://bugs.php.net/fix.php?id=80826&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80826&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80826&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80826&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80826&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80826&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80826&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80826&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80826&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80826&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80826&r=mysqlcfg