致命错误：调用未定义的方法DOMElement :: createTextNode（）

Question

I get the message Call to undefined method DOMElement::createTextNode() .

My xml file has the tag entries, which have various entryresult tags inside with number and title

My code:

$dom = new DOMDocument;
$dom->load('results.xml');
$student = $dom->documentElement;
$studentinfo = $student->getElementsByTagName('title')->item(0);
$newName = $student->createTextNode('Book1'); 
$student->replaceChild($newName, $student); 
$dom->saveXML();

I want to get to entries->entryresult->title for a given number , edit the name of the title (for example bookA to bookB) and save it.

Answer 1

The create*() methods are part of the DOMDocument , not the element nodes.

$newName = $dom->createTextNode('Book1');

If you don't have the document in the current context you can read it from DOMNode::$ownerDocument .

$newName = $student->ownerDocument->createTextNode('Book1');