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PHP | DOMCharacterData insertData() Function

Last Updated : 25 Apr, 2025

The DOMCharacterData::insertData() function is an inbuilt function in PHP which is used to insert a string at the specified 16-bit unit offset. Syntax:

void DOMCharacterData::insertData( int $offset, string $data )

Parameters: This function accept two parameters as mentioned above and described below:

$offset: It specifies the starting point to insert data.
$data: It specifies the data to insert.

Return Value: This function does not return any value. Below given programs illustrate the DOMCharacterData::insertData() function in PHP: Program 1:

<?php 
  
// Create a new DOM Document 
$dom = new DOMDocument('1.0', 'iso-8859-1'); 
  
// Create a div element 
$element = $dom->appendChild(new DOMElement('div')); 
  
// Create a DOMCdataSection  
$text = $element->appendChild( 
        new DOMCdataSection('GeeksGeeks')); 
  
// Insert 'For' between Geeks and Geeks 
$text->insertData(5, 'For'); 
  
echo $dom->saveXML(); 
?> 

Output:

<?xml version="1.0" encoding="iso-8859-1"?>
<div><![CDATA[GeeksForGeeks]]></div>

Use Chrome Developer tools to view the HTML or press Ctrl+U

Program 2:

<?php 
  
// Create a new DOM Document 
$dom = new DOMDocument('1.0', 'iso-8859-1'); 
  
// Create a div element 
$element = $dom->appendChild(new DOMElement('div')); 
  
// Create a DOMCdataSection  
$text = $element->appendChild( 
        new DOMCdataSection('My DOM Characters')); 
  
// Insert in the beginning 
$text->insertData(0, 'Beginning'); 
  
echo $dom->saveXML(); 
?> 

Output:

<?xml version="1.0" encoding="iso-8859-1"?>
<div><![CDATA[BeginningMy DOM Characters]]></div>

Program 3:

<?php 
  
// Create a new DOM Document 
$dom = new DOMDocument('1.0', 'iso-8859-1'); 
  
// Create a div element 
$element = $dom->appendChild(new DOMElement('div')); 
  
// Create a DOMCdataSection  
$text = $element->appendChild( 
        new DOMCdataSection('My DOM Characters')); 
  
// Insert in the end 
$text->insertData(17, 'End'); 
  
echo $dom->saveXML(); 
?> 

Output:

<?xml version="1.0" encoding="iso-8859-1"?>
<div><![CDATA[My DOM CharactersEnd]]></div>

Reference: https://www.php.net/manual/en/domcharacterdata.insertdata.php

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