XMLReader::expand

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    XMLReader::expand — Returns a copy of the current node as a DOM object

    Description

    public XMLReader::expand(?DOMNode $baseNode = null): DOMNode|false

    This method copies the current node and returns the appropriate DOM object.

    Parameters

    baseNode

    A DOMNode defining the target DOMDocument for the created DOM object.

    Return Values

    The resulting DOMNode or false on error.

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    User Contributed Notes 1 note

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    Sbastien
    2 years ago
    XMLReader::expand() expands the current subtree to DOM. SimpleXML is good too. To avoid a warning like "Imported Node must have associated Document" when using simplexml_import_dom(), we can do :

    <?php

    // Huge XML compressed file
    $xml = XMLReader::open('compress.zlib:///path/to/my-data.xml.gz');

    // Targeting a tiny subtree
    while ($xml->name !== 'my-targeted-element') {
    $xml->read();
    }

    // The trick is here...
    // Subtree is expanded in an empty document...
    $dom = $xml->expand(new DOMDocument());

    // ... which can be imported by SimpleXML
    $sx = simplexml_import_dom($dom);

    // We can now process our tiny subtree with SimpleXML $sx
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