Bug #54943 [NEW]: Array_merge links resulting array to source arrays by reference.

From: Operating system: Mac OSX PHP version: 5.3.6 Package: *General Issues Bug Type: Bug Bug description:Array_merge links resulting array to source arrays by reference. 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 bug report at http://bugs.php.net/bug.php?id=54943&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=54943&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=54943&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=54943&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=54943&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=54943&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=54943&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=54943&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=54943&r=needscript Try newer version: http://bugs.php.net/fix.php?id=54943&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=54943&r=support Expected behavior: http://bugs.php.net/fix.php?id=54943&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=54943&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=54943&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=54943&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54943&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=54943&r=dst IIS Stability: http://bugs.php.net/fix.php?id=54943&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=54943&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=54943&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=54943&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=54943&r=mysqlcfg