Bug #54943 [Opn->Bgs]: Array_merge links resulting array to source arrays by reference.

Edit report at http://bugs.php.net/bug.php?id=54943&edit=1 ID: 54943 Updated by: dsp@php.net Reported by: dtrenz at gmail dot com Summary: Array_merge links resulting array to source arrays by reference. -Status: Open +Status: Bogus Type: Bug Package: *General Issues Operating System: Mac OSX PHP Version: 5.3.6 Block user comment: N Private report: N 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 they both hold the same reference: http://www.php.net/manual/en/language.oop5.references.php Previous Comments: ------------------------------------------------------------------------ [2011-05-27 19:41:16] dtrenz at gmail dot com Description: ------------ When using array_merge() on an array of objects, the resulting array is linked to the source array(s) as if passed by reference so that modifying the resulting array after the merge ALSO modifies the source array. Test script: --------------- <?php $obj = (object) null; $obj->name = 'Bob'; $arrA = array(); $arrB = array($obj); // name = "Bob" $arrA = array_merge($arrA, $arrB); // Change name property of first element $arrA[0]->name = 'Joe'; print_r($arrA); // name = "Joe" print_r($arrB); // name = "Joe"; source array was modified, should still be "Bob Expected result: ---------------- Array ( [0] => stdClass Object ( [name] => Joe ) ) Array ( [0] => stdClass Object ( [name] => Bob ) ) Actual result: -------------- Array ( [0] => stdClass Object ( [name] => Joe ) ) Array ( [0] => stdClass Object ( [name] => Joe ) ) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54943&edit=1