DirectoryIterator::rewind

(PHP 5)

DirectoryIterator::rewind — Rewind the DirectoryIterator back to the start

说明

public void DirectoryIterator::rewind ( void )

Rewind the DirectoryIterator back to the start.

参数

此函数没有参数。

返回值

没有返回值。

范例

Example #1 DirectoryIterator::rewind() example

  <?php
$iterator  = new  DirectoryIterator ( dirname ( __FILE__ ));

 $iterator -> next ();
echo  $iterator -> key ();  //1

 $iterator -> rewind ();  //rewinding to the beginning
 echo  $iterator -> key ();  //0
 ?>

参见

DirectoryIterator::current() - Return the current DirectoryIterator item.
DirectoryIterator::key() - Return the key for the current DirectoryIterator item
DirectoryIterator::next() - Move forward to next DirectoryIterator item
DirectoryIterator::valid() - Check whether current DirectoryIterator position is a valid file
Iterator::rewind() - 返回到迭代器的第一个元素