DOMDocument::createElement

(PHP 5, PHP 7, PHP 8)

DOMDocument::createElement — Yeni bir eleman düğümü oluşturur

Açıklama

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

Yeni bir DOMElement nesnesi oluşturur. Bu düğüm, DomNode::append_child() gibi bir yöntemle belgeye yerleştirilmedikçe belgede gösterilmez.

Bağımsız Değişkenler

localName

Elemanın etiket ismi.

value

Elemanın değeri. Öntanımlı olarak boş eleman oluşturulur. Değer daha sonra DOMElement::$nodeValue() ile atanabilir.

< ve > öğe başvuruları öncelenmedikçe değer birebir kulllanılır. Dikkat: & öncelenmek zorundadır, aksi takdirde öğe başvurusunun başlangıç karakteri olarak ele alınmaz. Ayrıca, " karakteri öncelenmez.

Dönen Değerler

Bir hata oluşursa false yoksa yeni bir DOMElement nesnesi döner.

Hatalar/İstisnalar

DOM_INVALID_CHARACTER_ERR: localName geçersiz karakter içeriyorsa oluşur.

Örnekler

Örnek 1 - Yeni bir eleman oluşturup belge elemanı yapmak

<?php

$dom = new DOMDocument('1.0', 'utf-8');
$element = $dom->createElement('test', 'This is the root element!');

// Oluşturduğumuz elemanı belge elemanı yapalım
$element->appendChild($element_ns);

echo $dom->saveXML();
?>

Yukarıdaki örneğin çıktısı:

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

Örnek 2 - value olarak öncelenmemiş & içeren metin kullanmak

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

Yukarıdaki örnek şuna benzer bir çıktı üretir:

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

Notlar

Bilginize:
value öncelenMEyecektir. Önceleme destekli bir metin düğümü oluşturmak istiyorsanız DOMDocument::createTextNode() kullanın.

Ayrıca Bakınız

DOMNode::appendChild() - Listenin sonuna yeni bir çocuk ekler
DOMDocument::createAttribute() - Yeni bir öznitelik düğümü oluşturur
DOMDocument::createAttributeNS() - Yeni bir isim alanlı öznitelik düğümü oluşturur
DOMDocument::createCDATASection() - Yeni bir CDATA düğümü oluşturur
DOMDocument::createComment() - Yeni bir açıklama düğümü oluşturur
DOMDocument::createDocumentFragment() - Yeni bir belge bölütü oluşturur
DOMDocument::createElementNS() - İsim alanlı bir eleman düğümü oluşturur
DOMDocument::createEntityReference() - Yeni bir öğe bildirimi düğümü oluşturur
DOMDocument::createProcessingInstruction() - Yeni bir işlem komutu düğümü oluşturur
DOMDocument::createTextNode() - Yeni bir metin düğümü oluşturur

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User Contributed Notes 9 notes

down

mikek dot nospam at nospam dot muonics dot com ¶

17 years ago

With regard to the note below about needing htmlentities to avoid warnings about unterminated entity references, I thought it worthwhile to mention that that you don't need to with createTextNode and DOMText::__construct.  If you mix both methods of setting text nodes and do (or don't) apply htmlentities consistently to all data to be displayed, you'll get &amp;s (or warnings and badly-formed xml).

It's probably in one's best interest to extend DOMElement and DOMDocument so that it creates a DOMText node and appends it, rather than passing it up to the DOMElement constructor.  Otherwise, good luck using (or not using) htmlentities in all the right places in your code, especially as code changes get made.

<?php

class XDOMElement extends DOMElement {
    function __construct($name, $value = null, $namespaceURI = null) {
        parent::__construct($name, null, $namespaceURI);
    }
}

class XDOMDocument extends DOMDocument {
    function __construct($version = null, $encoding = null) {
        parent::__construct($version, $encoding);
        $this->registerNodeClass('DOMElement', 'XDOMElement');
    }

    function createElement($name, $value = null, $namespaceURI = null) {
        $element = new XDOMElement($name, $value, $namespaceURI);
        $element = $this->importNode($element);
        if (!empty($value)) {
            $element->appendChild(new DOMText($value));
        }
        return $element;
    }
}

$doc1 = new XDOMDocument();
$doc1_e1 = $doc1->createElement('foo', 'bar & baz');
$doc1->appendChild($doc1_e1);
echo $doc1->saveXML();

$doc2 = new XDOMDocument();
$doc2_e1 = $doc2->createElement('foo');
$doc2->appendChild($doc2_e1);
$doc2_e1->appendChild($doc2->createTextNode('bar & baz'));
echo $doc2->saveXML();

?>

Text specified in createElement:
<?xml version=""?>
<foo>bar &amp; baz</foo>

Text added via createTextNode:
<?xml version=""?>
<foo>bar &amp; baz</foo>

down

yasindagli at gmail dot com ¶

15 years ago

To create elements with attributes,

<?php

function createElement($domObj, $tag_name, $value = NULL, $attributes = NULL)
{
    $element = ($value != NULL ) ? $domObj->createElement($tag_name, $value) : $domObj->createElement($tag_name);

    if( $attributes != NULL )
    {
        foreach ($attributes as $attr=>$val)
        {
            $element->setAttribute($attr, $val);
        }
    }

    return $element;
}

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

$elm = createElement($dom, 'foo', 'bar', array('attr_name'=>'attr_value'));

$dom->appendChild($elm);

echo $dom->saveXML();

?>

outputs : 
<?xml version="1.0" encoding="utf-8"?>
<foo attr_name="attr_value">bar</foo>

down

sergsokolenko at gmail dot com ¶

17 years ago

To avoid warning message "unterminated entity reference" you may use htmlentities() for escaping supplied value:
<?php
//...
$dom->createElement('name', htmlentities($text))
//...
?>

down

funkathustra ¶

12 years ago

Although the built-in DOM functions are great, since they're designed to support generic XML, generating HTML DOMs becomes particularly verbose. I ended up writing this function to drastically speed things up.
Instead of calling something like
<?php 
  $div = $dom->createElement("div");
  $div->setAttribute("class","MyClass");
  $div->setAttribute("id","MyID");
  $someOtherDiv->appendChild($div);
?>
you can accomplish the same thing with:
<?php
  $div = newElement("div", $someOtherDiv, "class=MyClass;id=MyID");
?>
The "key1=value;key2=value" syntax is really fast to use, but obviously doesn't hold up if your content has those characters in it. So, you can also pass it an array:
<?php
  $div = newElement("div", $someOtherDiv, array("class","MyClass"));
?>
Or an array of arrays, representing different attributes:
<?php
  $div = newElement("form", $someOtherDiv, array(array("method","get"), array("action","/refer/?id=5");
?>

Here's the function:

<?php
function newElement($type, $insertInto = NULL, $params=NULL, $content="")
    {
        $tempEl =  $this->dom->createElement($type, $content);
        if(gettype($params) == "string" && strlen($params) > 0)
        {
            $attributesCollection =split(";", $params);
            foreach($attributesCollection  as $attribute)
            {
                $keyvalue = split("=", $attribute);
                $tempEl->setAttribute($keyvalue[0], $keyvalue[1]);
            }
        }
        if(gettype($params) == "array")
        {
            if(gettype($params[0]) == "array")
            {
                foreach($params as $attribute)
                {
                    $tempEl->setAttribute($attribute[0], $attribute[1]);
                }
            } else {
                $tempEl->setAttribute($params[0], $params[1]);
            }
        }
?>

down

tschmieder at bitworks dot de ¶

9 years ago

Remember:

If you want to perform multiple actions with a new node, you may need to create a copy of it before

means: 
## Create an address to an unique memory block !
$td = $dom->createElement('td');
## Change some things in this original unique pattern
$td->setAttribute('class', 'saldo');

## clone the unique pattern to two own one's
$td1 = clone $td;
$td2 = clone $td;

## alter properties in each one
$td1->nodeValue = 'Ich bin die erste neue Node';
$td2->nodeValue = 'Ich bin die zweite neue Node';

## find the parent element
$tr = $dom->getElementById('t001-tr001');
## find the first and the last child (here only for clearity)
$first = $tr->firstChild;
$last = $tr->lastChild;

## produce the new nodes
$newtd1 = $tr->insertBefore($td1, $first);
$newtd2 = $tr->appendChild($td2);

conclusion:
YOU NEED AN ORIGINAL NEW NODE FOR EACH ACTION!

down

estill at gvtc dot com ¶

17 years ago

Note that the second parameter (value), although convenient, is non-standard. You should create elements like this instead:

<?php
$doc = new DOMDocument('1.0', 'iso-8859-1');

$root = $doc->createElement('test');
$doc->appendChild($root);

$root_text = $doc->createTextNode('This is the root element!');
$root->appendChild($root_text);

print $doc->saveXML();
?>

Or, alternatively, extend the DOMDocument class and add your own custom, convenience method to avoid intruding on the standard:

<?php
class CustomDOMDocument extends DOMDocument {
  function createElementWithText($name, $child_text) {
    // Creates an element with a child text node
    
    // @param  string  $name        element tag name
    // @param  string  $child_text  child node text
    
    // @return  object  new element
    
    $element = $this->createElement($name);
    
    $element_text = $this->createTextNode($child_text);
    $element->appendChild($element_text);
    
    return $element;
  }
}

$doc = new CustomDOMDocument('1.0', 'iso-8859-1');

$root = $doc->createElementWithText('test', 'This is the root element!');
$doc->appendChild($root);

print $doc->saveXML();
?>

Also use caution with (or avoid) the 'DOMElement->nodeValue' property. It can return some unexpected values and changing its value will replace (remove) all descendants of the element with a single text node. It's also non-standard; according to the DOM spec it should return NULL.

down

lars dot c dot magnusson at gmail dot com ¶

14 years ago

You may think insertBefore and insertAfter is a direct alternative for appendChild, this is not the case. 



<?php

$dom = new DOMDocument(); 

$dom->load($file);



$dom->appendChild($newNode); //Works fine

$dom->insertBefore($newNode, $refNode); //Will fail



$refNode->parentNode->insertBefore($newNode, $refNode); // thanx to yasindagli (first post)

?>

down

chris AT cmbuckley DOT co DOT uk ¶

15 years ago

Note that the NUL character "\0" is not in the list of invalid characters for $name, so no error is triggered, but the tag name will be truncated at the null byte:

<?php

$dom = new DOMDocument('1.0', 'utf-8');
$el = $dom->createElement('foo' . "\0" . 'bar', 'Hello World');
echo $el->tagName; // outputs "foo"

?>

down

-1

dignat at yahoo dot com ¶

7 years ago

To create an element with DomDocument and to escape ampersand in the value.

Do this:

$element = new DOMDocument('1.0', 'UTF-8');

$test = $element->createElement('text');

$test ->appendChild($element->createElement('name'))
      ->appendChild($element->createtextNode('& I am ampersand');

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