Bug #62110 [Opn->Nab]: Foreach creates a copy of the array passed by value in function

Edit report at https://bugs.php.net/bug.php?id=62110&edit=1 ID: 62110 Updated by: johannes@php.net Reported by: a dot protaskin at gmail dot com Summary: Foreach creates a copy of the array passed by value in function -Status: Open +Status: Not a bug Type: Bug Package: Performance problem Operating System: Arch Linux PHP Version: 5.4.3 Block user comment: N Private report: N New Comment: As said above. Previous Comments: ------------------------------------------------------------------------ [2012-05-24 00:14:35] a dot protaskin at gmail dot com Thanks for your answers, nikic. I read your answer in the neighbouring entry and your articles too. I understood this behaviour, this is not the bug. Sorry for my bad english. ------------------------------------------------------------------------ [2012-05-23 21:59:30] nikic@php.net The foreach loop changes the internal array pointer. If the array zval wouldn't be separated the loop thus would thus affect he array which was passed by value, which is obviously not acceptable. ------------------------------------------------------------------------ [2012-05-22 19:56:06] a dot protaskin at gmail dot com Description: ------------ I also tried to execute this code on PHP 5.3.13 and PHP 5.2.17 with same result. All options are default. Test script: --------------- http://pastebin.com/caczCxuD Expected result: ---------------- Start: 786432 Inner by_reference: 786432 Inner foreach: 786432 After by_reference: 786432 Inner by_value: 786432 Inner foreach: 786432 After by_value: 786432 Actual result: -------------- Start: 786432 Inner by_reference: 786432 Inner foreach: 786432 After by_reference: 786432 Inner by_value: 786432 Inner foreach: 1310720 After by_value: 104857 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62110&edit=1