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Create a SplDoublyLinkedList, call setIteratorMode() and pass a SplDoublyLinkedList object as the parameter.
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Philip Norton philipnorton42@gmail.com
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$dll = new SplDoublyLinkedList(2);
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$dll->setIteratorMode(new SplDoublyLinkedList(2));
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Warning: SplDoublyLinkedList::setIteratorMode() expects parameter 1 to be long, object given in %s on line %d
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