PHP | XMLReader expand() Function

Last Updated : 20 Mar, 2020

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
<?xml version="1.0" encoding="utf-8"?>

<root>

<div> This is a div </div>

</root>

index.php

<?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; 
?> 

Output:
```
This is a div
```

Example 2:

data.xml
<?xml version="1.0" encoding="utf-8"?>

<body>

    <h1 style="color:green; font-size:100px;">

      GeeksforGeeks

    </h1>

</body>

index.php

<?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(); 