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    DOMNode::lookupNamespaceUri

    (PHP 5, PHP 7, PHP 8)

    DOMNode::lookupNamespaceUri — Gets the namespace URI of the node based on the prefix

    Description

    public DOMNode::lookupNamespaceUri(string $prefix): string

    Gets the namespace URI of the node based on the prefix.

    Parameters

    prefix

    The prefix of the namespace.

    Return Values

    The namespace URI of the node.

    See Also

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    User Contributed Notes 2 notes

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    7
    lewar
    16 years ago
    Simple way to get the URI of the default namespace:

    <?php
        $document     = new DOMDocument();
            $document->load($xml_file);
            $uri = $document->documentElement->lookupnamespaceURI(NULL);
    ?>
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    -5
    _ michael
    13 years ago
    You have to pass *null* to lookupNamespaceURI if you want to read the default namespace. Passing an empty string doesn't work - even though the documentation says that lookupNamespaceURI takes a string as argument (and null would just be converted to an empty string).
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