#42065 [NEW]: SPL ArrayObject does not use "copy-on-write"

From: a dot yamanoi at gmail dot com Operating system: PHP version: 5.2.3 PHP Bug Type: SPL related Bug description: SPL ArrayObject does not use "copy-on-write" Description: ------------ When ArrayObject::offsetSet() method stores a new value into an array, I expect ArrayObject to change only the array which is given as a constructor parameter. However, if the array is copied from another array and unchanged, ArrayObject will also change the another array. I thought it was a "copy-on-write" problem. thank you for any help Please excuse my English, it isn't very good. Reproduce code: --------------- $base = array('key' => 'old value'); $copy = $base; $ao = new ArrayObject($copy); $ao['key'] = 'new value'; echo '$base["key"] = ', $base['key'], "\n"; echo '$copy["key"] = ', $copy['key'], "\n"; echo '$ao["key"] = ', $ao['key'], "\n"; Expected result: ---------------- $base["key"] = old value $copy["key"] = new value $ao["key"] = new value Actual result: -------------- $base["key"] = new value $copy["key"] = new value $ao["key"] = new value -- Edit bug report at http://bugs.php.net/?id=42065&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42065&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42065&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42065&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=42065&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=42065&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=42065&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=42065&r=needscript Try newer version: http://bugs.php.net/fix.php?id=42065&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=42065&r=support Expected behavior: http://bugs.php.net/fix.php?id=42065&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=42065&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=42065&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=42065&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42065&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=42065&r=dst IIS Stability: http://bugs.php.net/fix.php?id=42065&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=42065&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=42065&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=42065&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=42065&r=mysqlcfg