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    SimpleXMLElement::key

    (No version information available, might only be in Git)

    SimpleXMLElement::key — Return 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 visualizzerà:

    bool(false)
string(4) "book"

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