DOMDocument::createElement fatal error (undefined method)

[freelance84]

NB:

The first section of php in this thread is extracted from the second. It is where the problem lies - ($newItem = $XMLpage->createElement('item', $updateValue);).

 

 

I am trying to simply add an element into an xml document via DOMDocument::createElement. However the following returns a fatal error:

<b>Fatal error</b>:  Call to undefined method DOMElement::createElement()

The error section in question extracted from the full function

//load up and get ready the xml file to edit
$xml = new DOMDocument('1.0', 'utf-8');
$xml->load($fullPathToXML);

//load the page we are changing
$XMLpage = $xml->getElementsByTagName('page')->item($page_number);

//created the new item node
$newItem = $XMLpage->createElement('item', $updateValue);

//append the item to the xml sheet on the correct page
$XMLpage->appendChild($newItem);

//now save the xml to file					
$xml->save($fullPathToXML);

 

 

Would anyone have any ideas why it is returning a fatal error here? I have used the official example on the DOMDocument::createElement and the php version i am using is 5.3.8

 

 

The full function (the rest of which works fine):

/*** modifying a single section of an xml sheet ***/
public function model_updateXMLfile($id = null, $updateValue = null, $inputType = null)
	{
		//if either the values sent are empty
		if(empty($id))
			{
				exit();
			}

		//get the comain name form the sessions
		$xmlFile= $_SESSION['xmlFile'];
		//replace all . with DOT as this will be the actual file name
		$xmalFileName = str_replace('.','DOT',$xmlFile);
		//get the xmla location directory from the sessions
		$xmlLocation = $_SESSION['xml_location'];
		//first make the path a whole path based the $_SESSION['xml_location']
		$fullPathToXML = WEBROOT.'xml/'.$xmlLocation.'/'.$xmalFileName.'.xml';


		//now get the coords of what page to change
		$id_exploded = explode('_',$id);

		//page number to edit
		$page_number = $id_exploded[0];

		//item number
		$item_number = $id_exploded[1];

		//load up and get ready the xml file to edit
		$xml = new DOMDocument('1.0', 'utf-8');
		$xml->formatOutput = true;
		$xml->preserveWhiteSpace = false;
		$xml->load($fullPathToXML);

		//load the page we are changing
		$XMLpage = $xml->getElementsByTagName('page')->item($page_number);

		//if the user wants to change the top title
		if($item_number == 'topTitle')
			{
				$htmlTitle = $XMLpage->getElementsByTagName('topTitle')->item(0);
				$htmlTitle ->nodeValue = $updateValue;
				$XMLpage->replaceChild($htmlTitle, $htmlTitle);
				$xml->save($fullPathToXML);
			}

		//else changing an item
		else{
				/**check the item exists, if it does then simply edit ***/
				if($XMLpage->getElementsByTagName('item')->item($item_number))
					{
						//update the content of the xml tag
						$xmlItem = $XMLpage->getElementsByTagName('item')->item($item_number);

						//change the content of the xml tag
						$xmlItem ->nodeValue = $updateValue;

						//update the node in the xml file
						$XMLpage->replaceChild($xmlItem, $xmlItem);

						//now change the attibute of the item according to what was sent
						$xmlItem->setAttribute('type', "$inputType");

						//now save the xml to file					
						$xml->save($fullPathToXML);
					}
				/** a new item is being created **/
				else
					{
						//created the new item node
						$newItem = $XMLpage->createElement('item', $updateValue);

						//append the item to the xml sheet on the correct page
						$XMLpage->appendChild($newItem);

						//now save the xml to file					
						$xml->save($fullPathToXML);
					}
			}

		//return the message saved
		return 'saved';
	}

[freelance84]

 

I'm really confused. I can't find anything on this.

 

Is there an extra php extension i need to install to be able to use createElement?

[freelance84]

http://www.phpfreaks.com/tutorial/handling-xml-data

[freelance84]

THIS FAILED

//load up and get ready the xml file to edit
$xml = new DOMDocument('1.0', 'utf-8');
$xml->load($fullPathToXML);

//load the page we are changing
$XMLpage = $xml->getElementsByTagName('page')->item($page_number);

//created the new item node
$newItem = $XMLpage->createElement('item', $updateValue);

//append the item to the xml sheet on the correct page
$XMLpage->appendChild($newItem);

//now save the xml to file					
$xml->save($fullPathToXML);

 

THIS SUCCEEDED

//load up and get ready the xml file to edit
$xml = new DOMDocument('1.0', 'utf-8');
$xml->load($fullPathToXML);

//load the page we are changing
$XMLpage = $xml->getElementsByTagName('page')->item($page_number);

//create and append the new item in on go as according to the manual from the this forum by 'Daniel'
$XMLpage->appendChild($xml->createElement('item', 'test content'));

//now save the xml to file					
$xml->save($fullPathToXML);

 

I'm really not sure how the top version kept returning with a message saying the method createElement doesn't exist when the bottom version works... 

 

But it now works either way.

[kicken]

Top version:

$newItem = $XMLpage->createElement('item', $updateValue);

 

 

Bottom version

$xml->createElement('item', 'test content');

 

 

XMLPage is not a domdocument, it's a DOMElement.  DOMElement has no createElement method.

[freelance84]

 

Ahh... of course!

 

I completely missed that 

 

Thanks!