(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SeekableIterator::seek — Seeks to a position
offsetThe position to seek to.
没有返回值。
Implementations should throw an OutOfBoundsException
if the offset is not seekable.
示例 #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();
?>以上示例的输出类似于：
damson