SeekableIterator::seek

(PHP 5 >= 5.1.0, PHP 7)

SeekableIterator::seek — 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 position is not seekable.

范例

Example #1 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