The DOMDocument::createComment() function is an inbuilt function in PHP which is used to create a new instance of class createComment.
Syntax:
DOMComment DOMDocument::createComment( string $data )
Parameters: This function accepts single parameter $data which holds the content of the comment node.
Return Value: This function returns the new DOMComment object on success or FALSE on failure.
Below programs illustrate the DOMDocument::createComment() function in PHP:
Program 1:
<?php   // Create a new DOMDocument $domDocument = new DOMDocument('1.0', 'iso-8859-1');   // Use createComment() function to add a new comment node $domComment = $domDocument->createComment('neveropen');   // Append element to the document $domDocument->appendChild($domComment);   // Save the XML file and display it echo $domDocument->saveXML();   ?> |
Output:
<?xml version="1.0" encoding="iso-8859-1"?> <!--neveropen-->
Program 2:
<?php   // Create a new DOMDocument $domDocument = new DOMDocument('1.0', 'iso-8859-1');   // Use createComment() function to add a new comment node $domComment1 = $domDocument->createComment('Starting XML document file'); $domComment2 = $domDocument->createComment('Ending XML document file');   // Use createElement() function to add a new element node $domElement1 = $domDocument->createElement('organization'); $domElement2 = $domDocument->createElement('name', 'neveropen'); $domElement3 = $domDocument->createElement('address', 'Noida'); $domElement4 = $domDocument->createElement('email', 'abc@geeksforgeeks.org');   // Append element to the document $domDocument->appendChild($domComment1);   $domDocument->appendChild($domElement1); $domElement1->appendChild($domElement2); $domElement1->appendChild($domElement3); $domElement1->appendChild($domElement4);   $domDocument->appendChild($domComment2);   // Save the XML file and display it echo $domDocument->saveXML();   ?> |
Output:
<?xml version="1.0" encoding="iso-8859-1"?>
<!--Starting XML document file-->
<organization>
<name>neveropen</name>
<address>Noida</address>
<email>abc@geeksforgeeks.org</email>
</organization>
<!--Ending XML document file-->
Reference: https://www.php.net/manual/en/domdocument.createcomment.php
