SimpleXMLElement::key

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SimpleXMLElement::keyReturn current key

Descrizione

public SimpleXMLElement::key(): string
Avviso

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.

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

Returns the XML tag name of the element referenced by the current SimpleXMLElement object.

Errori/Eccezioni

Throws an Error on failure.

Log delle modifiche

Versione Descrizione
8.1.0 An Error is now thrown if SimpleXMLElement::key() is called on an invalid iterator. Previously, false was returned.

Esempi

Example #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());

?>

Il precedente esempio visualizzerĂ :

bool(false)
string(4) "book"

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