DirectoryIterator
PHP Manual

DirectoryIterator::key

Return the key for the current DirectoryIterator item

Description

public mixed DirectoryIterator::key()

Get the key for the current DirectoryIterator item.

Parameters

This function has no parameters.

Return Values

The key for the current DirectoryIterator item as an int.

Changelog

Version Description
8.1.0 When the iterator is uninitialized, an Error is thrown now. Previously, the method returned false.

Examples

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";
    }
}
?>

The above example will output something similar to:

0 => apple.jpg
1 => banana.jpg
2 => index.php
3 => pear.jpg

See Also

  • DirectoryIterator::current
  • DirectoryIterator::next
  • DirectoryIterator::rewind
  • DirectoryIterator::valid
  • Iterator::key