SeekableIterator::seek

(PHP 5 >= 5.1.0)

SeekableIterator::seek — Seeks to a position

说明

abstract public void SeekableIterator::seek ( int $position )

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