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SplQueue::setIteratorMode

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplQueue::setIteratorMode — Sets the mode of iteration

說(shuō)明

public SplQueue::setIteratorMode(int $mode): void

參數

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

警告

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

返回值

沒(méi)有返回值。

錯誤／異常

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

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