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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

    说明

    public DOMNode::lookupNamespaceURI(?string $prefix): ?string

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

    参数

    prefix

    The prefix to look for. If this parameter is null, the method will return the default namespace URI, if any.

    返回值

    Returns the associated namespace URI or null if none is found.

    参见

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    User Contributed Notes 2 notes

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    7
    lewar
    17 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
    14 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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