PHP | XMLWriter startCdata() Function

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The XMLWriter::startCdata() function is an inbuilt function in PHP which is used to start the CDATA. This element then needs to be closed with XMLWriter::endCdata() function. CDATA is a block of text which is not parsed by the parser but are recognized as markup.

Syntax:

bool XMLWriter::startCdata( void )

Parameters:This function doesn’t accept any parameter.

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

Below examples illustrate the XMLWriter::startCdata() function in PHP:

Example 1:

<?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 a element 
$writer->startElement('h1'); 
  
// Start the Cdata 
$writer->startCdata(); 
  
// Add value to the Cdata 
$writer->text('value'); 
  
// End the Cdata 
$writer->endCdata(); 
  
// End the element 
$writer->endElement(); 
  
// End the document 
$writer->endDocument(); 
?> 

Output:

<?xml version="1.0" encoding="UTF-8"?>
<h1><![CDATA[value]]></h1>

Example 2:

<?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 a element 
$writer->startElement('p'); 
  
// Start the Cdata 
$writer->startCdata(); 
  
// Add value to the Cdata which is not 
// going to be visible on the webpage 
$writer->text('This will be secret text,  
                 not visible in browser'); 
  
// End the Cdata 
$writer->endCdata(); 
  
// Add value to the element 
$writer->text('zambiatek, portal for 
                       Computer Science.'); 
  
// End the element 
$writer->endElement(); 
  
// End the document 
$writer->endDocument(); 
?> 

Output:

<?xml version="1.0" encoding="UTF-8"?>
<p><![CDATA[This will be secret text, not visible in browser]]>
    zambiatek, portal for Computer Science.
</p>

Reference: https://www.php.net/manual/en/function.xmlwriter-start-cdata.php

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