DirectoryIterator::key
(PHP 5, PHP 7, PHP 8)
DirectoryIterator::key — Return the key for the current DirectoryIterator item
Description
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() - Return the current DirectoryIterator item
- DirectoryIterator::next() - Move forward to next DirectoryIterator item
- DirectoryIterator::rewind() - Rewind the DirectoryIterator back to the start
- DirectoryIterator::valid() - Check whether current DirectoryIterator position is a valid file
- Iterator::key() - Return the key of the current element
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