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SimpleXMLElement::key — Return current key
Prior to PHP 8.0, SimpleXMLElement::key() was only declared on the subclass SimpleXMLIterator.
This method gets the XML tag name of the current element.
У этой функции нет параметров.
Returns the XML tag name of the element referenced by the current SimpleXMLElement object.
Throws an Error on failure.
| Версия | Описание |
|---|---|
| 8.1.0 |
An Error is now thrown if
SimpleXMLElement::key() is called on an
invalid iterator. Previously, false was returned.
|
Пример #1 Get the current XML tag key
<?php
$xmlElement = new SimpleXMLElement('<books><book>PHP basics</book><book>XML basics</book></books>');
echo var_dump($xmlElement->key());
$xmlElement->rewind(); // rewind to the first element
echo var_dump($xmlElement->key());
?>
Результат выполнения данного примера:
bool(false) string(4) "book"