PHP | DOMImplementation createDocument() Function

Last Updated : 26 Feb, 2020

The DOMImplementation::createDocument() function is an inbuilt function in PHP which is used to create a DOMDocument object of the specified type with its document element. Syntax:

DOMDocument DOMImplementation::createDocument( string $namespaceURI = NULL, 
string $qualifiedName = NULL, DOMDocumentType $doctype = NULL )

Parameters: This function accepts three parameters as mentioned above and described below:

$namespaceURI (Optional): It specifies the namespace URI of the document element to create.
$qualifiedName (Optional): It specifies the qualified name of the document element to create.
$doctype (Optional): It specifies the type of document to create or NULL.

Return Value: This function returns DOMDocument object on success. Exceptions: This function throws DOM_WRONG_DOCUMENT_ERR, if doctype has already been used with a different document or was created from a different implementation or DOM_NAMESPACE_ERR, if there is an error with the namespace, as determined by $namespaceURI and $qualifiedName. Below examples illustrate the DOMImplementation::createDocument() function in PHP: Example 1:

php

<?php

// Create a DOMImplementation instance
$documentImplementation = new DOMImplementation();
 
// Create a document
$document = $documentImplementation->createDocument(null, 'html');
 
// Get the document element
$html = $document->documentElement;
 
// Create a HTML element
$head = $document->createElement('html');

// Create a strong element
$title = $document->createElement('strong');
$text = $document->createTextNode('GeeksforGeeks');
$body = $document->createElement('body');
 
// Append the children
$title->appendChild($text);
$head->appendChild($title);
$html->appendChild($head);
$html->appendChild($body);
 
// Render the XML
echo $document->saveXML();
?>

Output:

Example 2:

php

<?php

// Create a DOMImplementation instance
$documentImplementation = new DOMImplementation();
 
// Create a document
$document = $documentImplementation->createDocument(null, 'html');
 
// Get the document element
$html = $document->documentElement;
 
// Create a HTML element
$head = $document->createElement('html');

// Create a paragraph element
$p = $document->createElement('p');

// Create a text node
$text = $document->createTextNode('GeeksforGeeks');
 
// Append the children
$p->appendChild($text);

// Set the CSS using attribute 
$p->setAttribute('style', 'color:blue;font-size:100px');

// Append paragraph to the head of document
$head->appendChild($p);

// Append head to the html
$html->appendChild($head);
 
// Render the XML
echo $document->saveXML();
?>