PHP | XMLReader expand() Function

The XMLReader::expand() function is an inbuilt function in PHP which is used to copy the current node and returns the appropriate DOM object.

Syntax:

DOMNode XMLReader::expand( DOMNode $basenode )

Parameters: This function accepts a single parameter $basenode which holds a DOMNode defining the target DOMDocument for the created DOM object.



Return Value: This function returns DOMNode on success or FALSE on failure.

Below examples illustrate the XMLReader::expand() function in PHP:

Example 1:

  • data.xml
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    <?xml version="1.0" encoding="utf-8"?>
    <root>
        <div> This is a div </div>
    </root>

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  • index.php
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    <?php
      
    // Create a new XMLReader instance
    $XMLReader = new XMLReader();
      
    // Open the XML file
    $XMLReader->open('data.xml');
      
    // Move to the first node
    $XMLReader->read();
      
    // Read it as a element
    $element = $XMLReader->expand();
      
    // Print the node value to the browser
    echo $element->nodeValue;
    ?>

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  • Output:
    This is a div

Example 2:

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    <?xml version="1.0" encoding="utf-8"?>
    <body>
        <h1 style="color:green; font-size:100px;"
          GeeksforGeeks 
        </h1>
    </body>

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    <?php
      
    // Create a new XMLReader instance
    $XMLReader = new XMLReader();
      
    // Open the XML file
    $XMLReader->open('data.xml');
      
    // Move to the first node
    $XMLReader->read();
      
    // Read it as a element
    $element = $XMLReader->expand();
      
    // Create a new DOMDocument instance
    $DOMDocument = new DOMDocument();
      
    // Append the child to the element
    $DOMDocument->appendChild($element);
      
    // Render the XML in browser
    echo $DOMDocument->saveXML();

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  • Output:

Reference: https://www.php.net/manual/en/xmlreader.expand.php




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