DOMDocument::createElement

(PHP 5, PHP 7, PHP 8)

DOMDocument::createElementCreate new element node

Descrizione

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

This function creates a new instance of class DOMElement. Questo nodo non verrà mostrato nel documento a meno che venga inserito con, es. DOMNode::appendChild().

Elenco dei parametri

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.

Valori restituiti

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

Errori/Eccezioni

DOM_INVALID_CHARACTER_ERR

Raised if localName contains an invalid character.

Esempi

Example #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();
?>

Il precedente esempio visualizzerà:

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

Example #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();
?>

Il precedente esempio visualizzerà qualcosa simile a:

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

Note

Nota:

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

Vedere anche: