Bug #67189 [Opn]: Clone is not implemented for IteratorIterator and related classes

Edit report at https://bugs.php.net/bug.php?id=67189&edit=1 ID: 67189 Updated by: johannes@php.net Reported by: ottodavid at gmx dot net Summary: Clone is not implemented for IteratorIterator and related classes Status: Open Type: Bug Package: SPL related Operating System: OS X PHP Version: 5.5.12 Block user comment: N Private report: N New Comment: Iterator is an interface which doesn't make any requirements towards cloneability. Adding clone support for IteratorIterator isn't easy as we can't guarantee state always. Previous Comments: ------------------------------------------------------------------------ [2014-05-03 12:16:49] ottodavid at gmx dot net Description: ------------ IteratorIterator and derived classes like FilterIterator, RegexIterator etc. are not cloneable, because the implementation for spl_dual_it.clone_obj is missing. This is issue, especially because Iterator is clonable, IteratorIterator is derived from Iterator and is not clonable, thereby violating the liskov substitution principle. Test script: --------------- <?php $arrayIterator = new ArrayIterator(array(1,2,3)); $it1 = new IteratorIterator($arrayIterator); $it2 = clone $it1; Actual result: -------------- PHP Fatal error: Trying to clone an uncloneable object of class IteratorIterator ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=67189&edit=1