SimpleXMLElement::key

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SimpleXMLElement::keyReturn current key

Descripción

public SimpleXMLElement::key(): string
Advertencia

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.

Parámetros

Esta función no tiene parámetros.

Valores devueltos

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

Errores/Excepciones

Throws an Error on failure.

Historial de cambios

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

Ejemplos

Ejemplo #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());

?>

El resultado del ejemplo sería:

bool(false)
string(4) "book"

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