SeekableIterator::seek()
(PHP 5 >= 5.1.0, PHP 7)
Seeks to a position
说明
abstract public SeekableIterator::seek(int $position): void
Seeks to a given position in the iterator.
参数
- $position
The position to seek to.
返回值
没有返回值。
错误/异常
Implementations should throw an OutOfBoundsException if the$positionis not seekable.
范例
SeekableIterator::seek() example
Seek to the item at position 3 in the iterator(ArrayIterator implements SeekableIterator).
<?php $array = array("apple", "banana", "cherry", "damson", "elderberry"); $iterator = new ArrayIterator($array); $iterator->seek(3); echo $iterator->current(); ?>
以上例程的输出类似于:
damson
参见
- SeekableIterator
- Iterator