(PHP 5, PHP 7, PHP 8)
DirectoryIterator::key — Return the key for the current DirectoryIterator item
此函數沒(méi)有參數。
The key for the current DirectoryIterator item as an int.
| 版本 | 說(shuō)明 |
|---|---|
| 8.1.0 |
When the iterator is uninitialized, an Error is
thrown now. Previously, the method returned false.
|
示例 #1 A DirectoryIterator::key() example
<?php
$dir = new DirectoryIterator(dirname(__FILE__));
foreach ($dir as $fileinfo) {
if (!$fileinfo->isDot()) {
echo $fileinfo->key() . " => " . $fileinfo->getFilename() . "\n";
}
}
?>
以上例程的輸出類(lèi)似于：
0 => apple.jpg 1 => banana.jpg 2 => index.php 3 => pear.jpg