DirectoryIterator::key()
(PHP 5,PHP 7)
Return the key for the current DirectoryIterator item
说明
public DirectoryIterator::key(void) : string
Get the key for the currentDirectoryIteratoritem.
参数
此函数没有参数。
返回值
The key for the currentDirectoryIteratoritem.
范例
Example#1 ADirectoryIterator::key()example
<?php $dir = new DirectoryIterator(dirname(__FILE__)); foreach ($dir as $fileinfo) { if (!$fileinfo->isDot()) { echo $fileinfo->key() . " => " . $fileinfo->getFilename() . "\n"; } } ?>
以上例程的输出类似于:
0 => apple.jpg 1 => banana.jpg 2 => index.php 3 => pear.jpg
参见
- DirectoryIterator::current() Return the current DirectoryIterator item
- DirectoryIterator::next() Move forward to next DirectoryIterator item
- DirectoryIterator::rewind() Rewind the DirectoryIterator back to the start
- DirectoryIterator::valid() Check whether current DirectoryIterator position is a valid file
- Iterator::key() 返回当前元素的键