Bug #81350 [Nab]: foreach returns unexpected result

Edit report at https://bugs.php.net/bug.php?id=81350&edit=1 ID: 81350 User updated by: wilhelm at blueend dot com Reported by: wilhelm at blueend dot com Summary: foreach returns unexpected result Status: Not a bug Type: Bug Package: Variables related Operating System: CentOS PHP Version: 7.4.22 Assigned To: cmb Block user comment: N Private report: N New Comment: Even after 15 years of PHP you learn new things :-) Thank you for the reference to the warning. Previous Comments: ------------------------------------------------------------------------ [2021-08-11 12:40:47] rtrtrtrtrt at dfdfdfdf dot dfd fix your broken expectation! after the first loop it is still a reference unless you use unset($t) between both loops - don't use references is the solution because you gain nothing but troubles in a COW language ------------------------------------------------------------------------ [2021-08-11 12:40:45] cmb@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Especially see the big warning on <https://www.php.net/manual/en/control-structures.foreach.php>. ------------------------------------------------------------------------ [2021-08-11 12:37:03] wilhelm at blueend dot com Description: ------------ If you have two foreach loops based on the same array and the first loop uses the variable as reference the second loop produces an unexpected result if the variable name for the value stays the same. Test script: --------------- $t = [1,2,3]; foreach ($t as &$testVar){ print_r($testVar); } foreach ($t as $testVar){ print_r($testVar); } Expected result: ---------------- I would expect the same output as if I would have used the non reference variant in the first place. I would expect => (Loop 1) 1,2,3 => (Loop 2) 1,2,>3< Actual result: -------------- I get => (Loop 1) 1,2,3 => (Loop 2) 1,2,>2< ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81350&edit=1