(PHP 5 >= 5.3.0, PHP 7)
FilesystemIterator::key — Retrieve the key for the current file
public FilesystemIterator::key ( ) : string
This function has no parameters.
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";
}
?> The above example will output something similar to:
apple.jpg banana.jpg example.php
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https://www.php.net/manual/en/filesystemiterator.key.php