SplQueue::setIteratorMode

(PHP 5 >= 5.3.0, PHP 7)

SplQueue::setIteratorMode — Sets the mode of iteration

说明

void SplQueue::setIteratorMode ( int $mode )

参数

mode

There is only one iteration parameter you can modify.

  • The behavior of the iterator (either one or the other):
    • 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

Warning

The direction of iteration can not be changed for SplQueues, it is always SplDoublyLinkedList::IT_MODE_FIFO.

返回值

没有返回值。

错误／异常

Throws a RuntimeException on trying to change the direction of iteration by using SplDoublyLinkedList::IT_MODE_LIFO.