(PHP 5, PHP 7)
DirectoryIterator::key — Return the key for the current DirectoryIterator item
Get the key for the current DirectoryIterator item.
此函数没有参数。
The key for the current DirectoryIterator item.
Example #1 A DirectoryIterator::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