DirectoryIterator::key

(PHP 5, PHP 7)

DirectoryIterator::key — Return the key for the current DirectoryIterator item

说明

public DirectoryIterator::key ( void ) : string

Get the key for the current DirectoryIterator item.

参数

此函数没有参数。

返回值

The key for the current DirectoryIterator item.

范例

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

参见