DirectoryIterator::key
(PHP 5, PHP 7, PHP 8)
DirectoryIterator::key — Return the key for the current DirectoryIterator item
Beschreibung
Get the key for the current DirectoryIterator item.
Parameter-Liste
Diese Funktion besitzt keine Parameter.
Rückgabewerte
The key for the current DirectoryIterator item as an Integer.
Changelog
| Version | Beschreibung |
|---|---|
| 8.1.0 |
When the iterator is uninitialized, an Error is
thrown now. Previously, the method returned false.
|
Beispiele
Beispiel #1 A DirectoryIterator::key() example
<?php
$dir = new DirectoryIterator(dirname(__FILE__));
foreach ($dir as $fileinfo) {
if (!$fileinfo->isDot()) {
echo $fileinfo->key() . " => " . $fileinfo->getFilename() . "\n";
}
}
?>Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
0 => apple.jpg 1 => banana.jpg 2 => index.php 3 => pear.jpg
Siehe auch
- 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() - Liefert den Schlüssel des aktuellen Elements
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