XMLReader::expand

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

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

说明

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

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

参数

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

返回值

The resulting DOMNode or false on error.

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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