PHP | XMLWriter endDtdEntity() Function

<?php

// Create a new XMLWriter instance
$writer = new XMLWriter();
    
// Create the output stream as PHP
$writer->openURI('php://output');
    
// Start the document
$writer->startDocument('1.0', 'UTF-8');
 
// Start the Dtd Entity
$writer->startDtdEntity('entity', true);
 
// End the Dtd Entity
$writer->endDtdEntity();
    
// End the document
$writer->endDocument();
?>

<?php
 
// Create a new XMLWriter instance
$writer = new XMLWriter();
     
// Create the output stream as PHP
$writer->openURI('php://output');
     
// Start the document
$writer->startDocument('1.0', 'UTF-8');
  
// Start the Dtd Entity which is
// not going to be visible
$writer->startDtdEntity('entity', true);
  
// End the Dtd Entity
$writer->endDtdEntity();
 
// Start a h1 element
$writer->startElement('h1');
 
// Add a style attribute
$writer->writeAttribute('style', 
          'color:blue;font-size:100;');
 
// Add text to the element
$writer->text('GeeksforGeeks');
 
// End the element
$writer->endElement();
     
// End the document
$writer->endDocument();
?>