DOMDocument::createElement

(PHP 5, PHP 7, PHP 8)

DOMDocument::createElement — Create new element node

Beschreibung

public DOMDocument::createElement(string $localName, string $value = ""): DOMElement|false

This function creates a new instance of class DOMElement. Dieser Knoten wird im Dokument erst dann angezeigt, wenn er mit (z. B.) DOMNode::appendChild() eingefügt wird.

Parameter-Liste

localName

The tag name of the element.

value

The value of the element. By default, an empty element will be created. The value can also be set later with DOMElement::$nodeValue.

The value is used verbatim except that the < and > entity references will escaped. Note that & has to be manually escaped; otherwise it is regarded as starting an entity reference. Also " won't be escaped.

Rückgabewerte

Returns a new instance of class DOMElement or false if an error occurred.

Fehler/Exceptions

DOM_INVALID_CHARACTER_ERR

Raised if localName contains an invalid character.

Beispiele

Beispiel #1 Creating a new element and inserting it as root

<?php

$dom = new DOMDocument('1.0', 'utf-8');

$element = $dom->createElement('test', 'This is the root element!');

// We insert the new element as root (child of the document)
$dom->appendChild($element);

echo $dom->saveXML();
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

<?xml version="1.0" encoding="utf-8"?>
<test>This is the root element!</test>

Beispiel #2 Passing text containing an unescaped & as value

<?php
$dom = new DOMDocument('1.0', 'utf-8');
$element = $dom->createElement('foo', 'me & you');
$dom->appendChild($element);
echo $dom->saveXML();
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

Warning: DOMDocument::createElement(): unterminated entity reference             you in /in/BjTCg on line 4
<?xml version="1.0" encoding="utf-8"?>
<foo/>

Anmerkungen

Hinweis:

The value will not be escaped. Use DOMDocument::createTextNode() to create a text node with escaping support.

Siehe auch