• 首页
  • vue
  • TypeScript
  • JavaScript
  • scss
  • css3
  • html5
  • php
  • MySQL
  • redis
  • jQuery
  • SeekableIterator::seek()

    (PHP 5 >= 5.1.0, PHP 7)

    Seeks to a position

    说明

    abstractpublicSeekableIterator::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