#49641 [Opn->Bgs]: call-by-value does not work on objects

ID: 49641 Updated by: sjoerd@php.net Reported By: alhajaj at yahoo dot com -Status: Open +Status: Bogus Bug Type: Scripting Engine problem Operating System: Windows XP PHP Version: 5.2.11 New Comment: 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 http://nl2.php.net/manual/en/language.oop5.references.php Previous Comments: ------------------------------------------------------------------------ [2009-09-23 10:52:29] alhajaj at yahoo dot com Description: ------------ when passing an object by value to a function it alters the original object and not a copy of it. Here is a script to reproduce it. I included the handling for passing strings which works as expected unlike passing objects. Reproduce code: --------------- <?php class User { var $name; function User(){$this->name = "tony";} } function changeUserByRef(&$user) { $user->name = "changeUserByRef";} function changeUserByValue($user) { $user->name = "changeUserByValue";} function changeStringByRef(&$str) { $str = "changeStringByRef";} function changeStringByValue($str) { $str = "changeStringByValue";} $user = new User(); echo($user->name . '</br>' ); changeUserByRef($user); echo("changeUserByRef = " . $user->name . '</br>' ); $user->name = "tony"; echo($user->name . '</br>' ); changeUserByValue($user); echo("changeUserByValue = ". $user->name . '</br>' ); echo('<hr />'); $user->name = "tony"; echo($user->name . '</br>' ); changeStringByRef($user->name); echo("changeStringByRef = " . $user->name . '</br>' ); $user->name = "tony"; echo($user->name . '</br>' ); changeStringByValue($user->name); echo("changeStringByValue = " . $user->name . '</br>' ); ?> Expected result: ---------------- tony changeUserByRef = changeUserByRef tony changeUserByValue = tony --------------------------------------------------- tony changeStringByRef = changeStringByRef tony changeStringByValue = tony Actual result: -------------- tony changeUserByRef = changeUserByRef tony changeUserByValue = changeUserByValue --------------------------------------------------- tony changeStringByRef = changeStringByRef tony changeStringByValue = tony ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=49641&edit=1