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(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::setIteratorMode — Sets the mode of iteration
mode
There are two orthogonal sets of modes that can be set:
SplDoublyLinkedList::IT_MODE_LIFO
(Stack style)SplDoublyLinkedList::IT_MODE_FIFO
(Queue style)SplDoublyLinkedList::IT_MODE_DELETE
(Elements are deleted by the iterator)SplDoublyLinkedList::IT_MODE_KEEP
(Elements are traversed by the iterator)
The default mode is: SplDoublyLinkedList::IT_MODE_FIFO
| SplDoublyLinkedList::IT_MODE_KEEP
The direction of iteration can not be changed for SplStack and
SplQueue classes, it is always SplDoublyLinkedList::IT_MODE_FIFO
.
Trying to modify it will result in a RuntimeException being thrown.
Returns the different modes and flags that affect the iteration.