(PHP 5 >= 5.3.0, PHP 7, PHP 8)
FilesystemIterator::key — Retrieve the key for the current file
此函数没有参数。
Returns the pathname or filename depending on the set flags. See the FilesystemIterator constants.
Example #1 FilesystemIterator::key() example
This example will list the contents of the directory containing the script.
<?php
$iterator = new FilesystemIterator(dirname(__FILE__), FilesystemIterator::KEY_AS_FILENAME);
foreach ($iterator as $fileinfo) {
echo $iterator->key() . "\n";
}
?>
以上例程的输出类似于：
apple.jpg banana.jpg example.php