CascadiaPHP 2024

SimpleXMLElement::addChild

(PHP 5 >= 5.1.3, PHP 7, PHP 8)

SimpleXMLElement::addChild XML ノードに子要素を追加する

説明

public SimpleXMLElement::addChild(string $qualifiedName, ?string $value = null, ?string $namespace = null): ?SimpleXMLElement

ノードに子要素を追加し、子要素の SimpleXMLElement を返します。

パラメータ

qualifiedName

追加する子要素の名前。

value

指定されている場合は、子要素の値。

namespace

指定されている場合は、その子要素が所属する名前空間。

戻り値

addChild メソッドは、 XML ノードに追加した子要素を表す SimpleXMLElement オブジェクトを返します。 失敗時に null を返します。

注意:

この例では example.php をインクルードしていますが、これは 基本的な使用法 の最初のサンプルにある XML 文字列を参照しています。

例1 SimpleXML 要素への属性と子要素の追加

<?php

include 'example.php';

$sxe = new SimpleXMLElement($xmlstr);
$sxe->addAttribute('type', 'documentary');

$movie = $sxe->addChild('movie');
$movie->addChild('title', 'PHP2: More Parser Stories');
$movie->addChild('plot', 'This is all about the people who make it work.');

$characters = $movie->addChild('characters');
$character = $characters->addChild('character');
$character->addChild('name', 'Mr. Parser');
$character->addChild('actor', 'John Doe');

$rating = $movie->addChild('rating', '5');
$rating->addAttribute('type', 'stars');

echo
$sxe->asXML();

?>

上の例の出力は、 たとえば以下のようになります。

<?xml version="1.0" standalone="yes"?>
<movies type="documentary">
 <movie>
  <title>PHP: Behind the Parser</title>
  <characters>
   <character>
    <name>Ms. Coder</name>
    <actor>Onlivia Actora</actor>
   </character>
   <character>
    <name>Mr. Coder</name>
    <actor>El Act&#xD3;r</actor>
   </character>
  </characters>
  <plot>
   So, this language. It's like, a programming language. Or is it a
   scripting language? All is revealed in this thrilling horror spoof
   of a documentary.
  </plot>
  <great-lines>
   <line>PHP solves all my web problems</line>
  </great-lines>
  <rating type="thumbs">7</rating>
  <rating type="stars">5</rating>
 </movie>
 <movie>
  <title>PHP2: More Parser Stories</title>
  <plot>This is all about the people who make it work.</plot>
  <characters>
   <character>
    <name>Mr. Parser</name>
    <actor>John Doe</actor>
   </character>
  </characters>
  <rating type="stars">5</rating>
 </movie>
</movies>

参考

add a note

User Contributed Notes 13 notes

up
40
frosty dot z at freesbee dot fr
11 years ago
To complete Volker Grabsch's comment, stating :
"Note that although addChild() escapes "<" and ">", it does not escape the ampersand "&"."

To work around that problem, you can use direct property assignment such as :

<?php
$xmlelement
->value = 'my value < > &';
// results in <value>my value &lt; &gt; &amp;</value>
?>

instead of doing :

<?php
$xmlelement
->addChild('value', 'my value < > &');
// results in <value>my value &lt; &gt; &</value> (invalid XML)
?>

See also: http://stackoverflow.com/questions/552957 (Rationale behind SimpleXMLElement's handling of text values in addChild and addAttribute)

HTH
up
27
alex dot feraud at gmail dot com
13 years ago
Here is a class with more functions for SimpleXMLElement :

<?php
/**
*
* Extension for SimpleXMLElement
* @author Alexandre FERAUD
*
*/
class ExSimpleXMLElement extends SimpleXMLElement
{
/**
* Add CDATA text in a node
* @param string $cdata_text The CDATA value to add
*/
private function addCData($cdata_text)
{
$node= dom_import_simplexml($this);
$no = $node->ownerDocument;
$node->appendChild($no->createCDATASection($cdata_text));
}

/**
* Create a child with CDATA value
* @param string $name The name of the child element to add.
* @param string $cdata_text The CDATA value of the child element.
*/
public function addChildCData($name,$cdata_text)
{
$child = $this->addChild($name);
$child->addCData($cdata_text);
}

/**
* Add SimpleXMLElement code into a SimpleXMLElement
* @param SimpleXMLElement $append
*/
public function appendXML($append)
{
if (
$append) {
if (
strlen(trim((string) $append))==0) {
$xml = $this->addChild($append->getName());
foreach(
$append->children() as $child) {
$xml->appendXML($child);
}
} else {
$xml = $this->addChild($append->getName(), (string) $append);
}
foreach(
$append->attributes() as $n => $v) {
$xml->addAttribute($n, $v);
}
}
}
}
?>
up
13
johninen at gmail dot com
8 years ago
In the docs for google sitemaps it is required an element for mobile sitemaps that looks like this: <mobile:mobile/>

I used some time to figure out how to make it, but it is quite simple when understood.

$mobile_schema = 'http://www.google.com/schemas/sitemap-mobile/1.0';

//Create root element
$xml_mobile = new SimpleXMLElement('
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:mobile="'.$mobile_schema.'"></urlset>
');

//Add required children
$url_mobile = $xml_b_list_mobile->addChild('url');
$url_mobile->addChild('loc', 'your-mobile-site-url');
$url_mobile->addChild('mobile:mobile', null, $mobile_schema);

For this to work properly the attribute xmlns:mobile must be set in the root node, and then used as namespace(third argument) when creating the mobile:mobile child with null as value.
up
3
nwarap
6 years ago
Want to continue the ampersand (&) chain problem.

Sometimes, you would want to assign (=) addChild.
This trick will helps you to do this.

<?php
$webOrders
= new SimpleXMLElement('<?xml version="1.0"?><WebOrders></WebOrders>');
$webOrder = $webOrders->addChild('WebOrder');
$product = $webOrder->addChild('Product');
$product[0] = 'T&M';
$product->addAttribute('price', 19.99);
$product->addAttribute('qty', 2);
var_dump($webOrders->asXML());
?>

OUTPUT would be:

<?xml version="1.0" encoding="UTF-8"?>
<WebOrders>
<WebOrder>
<Product price="19.99" qty="2">T&amp;M</Product>
</WebOrder>
</WebOrders>
up
7
Volker Grabsch
13 years ago
Note that although addChild() escapes "<" and ">", it does not escape the ampersand "&".

So addChild() is unsuited to handle user-defined input!

Instead, you will have to replace all "&" with "&amp;" before calling addChild().

Or, use htmlspecialchars() which also replaces other characters, but won't do any harm as addChild() won't replace those again.
up
1
ivan dot kakurov at gmail dot com
11 years ago
Here's my solution for creating XML from Multidimensional Array.
<?php
//DATA
$xmlDAta = array(
array(
"name" => "nameVal",
"value" => "valVal",
"css" => "cssVal"
),
array(
"name" => "name1Val",
"value" => "val1Val",
"css" => "css1Val"
),
"tname" => array(
array(
"iTname" => "iTname",
"iTname2" => "iTname1",
"iTname2" => "iTname2",
"iTbname3" => array(
"iiTbname" => "tbName",
"iiTbname1" => "tbName1",
),
),
),
"tdata" => "otheerDAta"
);

/**
* Create XML using string or array
*
* @param mixed $data input data
* @param SimpleXMLElement $xml
* @param string $child name of first level child
*
* @return adding Xml formated data into SimpleXmlElement
*/

function data2XML(array $data, SimpleXMLElement $xml, $child = "items")
{

foreach(
$data as $key => $val) {
if(
is_array($val)) {

if(
is_numeric($key)) {
$node = $xml->addChild($child);
$nodes = $node->getName($child);
} else {

$node = $xml->addChild($key);
$nodes = $node->getName($key);
}

$node->addChild($nodes, self::data2Xml($val, $node));
} else {
$xml->addChild($key, $val);
}
}

}

//Use

$xml = new SimpleXMLElement("<root/>");
Util::data2XML($xmlDAta, $xml, "Items");

?>
up
1
fluxlicious at gmail dot com
1 year ago
The class below allows you to write CDATA and to add additional attributes.

<?php
class SimpleXMLElementExtended extends \SimpleXMLElement
{
public function
addChildWithCData($name, $value)
{
$child = parent::addChild($name);
$element = dom_import_simplexml($child);
$docOwner = $element->ownerDocument;
$element->appendChild($docOwner->createCDATASection($value));
return
$child;
}
}
?>

Example:
<?php
$xml
= new SimpleXMLElementExtended('<xml></xml>');
$content = $xml->addChildWithCData('content', 'Title of the page');
$content->addAttribute('id', 1);
$content->addAttribute('enabled', 'true');

// Output:
// <xml>
// <content id="1" enabled="true"><![CDATA[Title of the page]]></content>
// </xml>
?>
up
1
caffeinatedbits
1 year ago
Just in case anyone else, like me, was trying to figure out a way to remove child elements...

<?php

$xml
= <<<EOF
<?xml version="1.0" encoding="utf-8" ?>
<Animals>
<Dog breed="chihuahua"/>
<Dog breed="poodle"/>
<Dog breed="invalid"/>
</Animals>
EOF;

$animals = new SimpleXMLElement($xml);

unset(
$animals->Dog[2]);

echo
$animals->asXML();

// <?xml version="1.0" encoding="utf-8"?>
// <Animals>
// <Dog breed="chihuahua"/>
// <Dog breed="poodle"/>
//
// </Animals>

?>

Note: you cannot remove elements while iterating children, otherwise it will break the Iterator. Example:

<?php

$xml
= <<<EOF
<?xml version="1.0" encoding="utf-8" ?>
<Animals>
<Dog breed="chihuahua"/>
<Dog breed="poodle"/>
<Dog breed="invalid"/>
</Animals>
EOF;

$animals = new SimpleXMLElement($xml);

$allowed_breeds = [
'chihuahua',
'poodle'
];

try {
$index = 0;
foreach (
$animals->Dog as $dog) {
if (!
in_array($dog['breed'], $allowed_breeds)) {
unset(
$animals->Dog[$index]);
}
$index++;
}
} catch (
Throwable $e) {
echo
$e->getMessage();
// SimpleXMLElement is not properly initialized
}

?>
up
0
carlos dot eduardo dot debiasi at gmail dot com
3 years ago
I create this function so you can through and array build the XML, this allows multiple keys with the same value.
The structure must follow

[
'key' => 'nameOfTheKey',
'attributes' => ['id' => '1'],
'fields' => [
['key' => 'fieldSamName', 'value' => '1'],
['key' => 'fieldSamName', 'value' => '1'],
['key' => 'fieldSamName', 'value' => '2'],
['key' => 'fieldWithChild', 'fields' => [
['key' => 'car', 'value' => '2'],
['key' => 'human', 'value' => '3'],
]],
]
];

Function:
function toXml(\SimpleXMLElement $node, array $data)
{
foreach ($data as $key => $value) {
$key = $value['key'];
if (isset($value['value'])) {
$newNode = $node->addChild($key, $value['value']);
if (isset($value['attributes'])) {
foreach ($value['attributes'] as $keyAttr => $valueAttr) {
$newNode->addAttribute($keyAttr, $valueAttr);
}
}
} else {
$newNode = $node->addChild($key);
if (isset($value['attributes'])) {
foreach ($value['attributes'] as $keyAttr => $valueAttr) {
$newNode->addAttribute($keyAttr, $valueAttr);
}
}
}
if (isset($value['fields'])) {
foreach ($value['fields'] as $keyField => $valueField) {
$this->toXml($newNode, [$keyField => $valueField]);
}
}
}
}
up
0
passerbyxp at gmail dot com
11 years ago
Be aware that simply because you can <?php $dom->addChild();?> doesn't mean your XML is valid under simple XML itself:

<?php
$dom
=simplexml_load_string("<test></test>");
$dom->addChild("3D","1,2,3");
$xml=$dom->asXML();
echo
$xml;
/* echos:
<?xml version="1.0"?>
<test><3D>1,2,3</3D></test>
*/

$dom=simplexml_load_string($xml);
/*
generates a whole lots of warnings,
and refuses to create an object.
*/
?>

Same in PHP 5.3 and 5.4
up
0
felipenmoura at gmail dot com
13 years ago
This method returns a reference to the specific SimpleXMLElement.
If you use:
<?php
$xml
= new SimpleXMLElement('<root></root>');
$xml->father['name']= 'Fathers name'; // creates automatically a father tag with attribute name
$son= $xml->father->addChild('son'); // uses the first father tag
$son['name']= 'first son';
$otherSon= $xml->father->addChild('son'); // uses the first father tag but now, in a second son tag
$otherSon['name']= 'second son';

echo
htmlentities($xml->asXML());
?>

The result will be
<root>
<father>
<son name='first son' />
<son name='second son' />
</father>
</root>

So, once you change something to the just added child, you are actually accessing the element inside the SimpleXMLElement as a reference.
up
-3
jerikojerk
12 years ago
If you're looking for a way to append children you may be interested in this:

<?php
$x
= new SimpleXMLElement('<root name="toplevel"></root>');
$f1 = new SimpleXMLElement('<child pos="1">alpha</child>');
$f2 = new SimpleXMLElement('<child pos="2">beta</child>');
$f3 = new SimpleXMLElement('<child pos="3">gamma</child>');

$x->{$f1->getName()} = $f1;
$x->{$f2->getName()}[] = $f2;
$x->{$f3->getName()}[] = $f3;

echo
'count child=',$x->count(),"\n";
echo
$x->asXML();

foreach (
$x->children() as $foo )
{
var_dump($foo);
}

?>
up
-11
thallisphp at gmail dot com
10 years ago
<?php
class MySimpleXMLElement extends SimpleXMLElement
{
/**
* Add SimpleXMLElement code into a SimpleXMLElement
*
* @param SimpleXMLElement $append
*/
public function appendXML($append)
{
if (
$append) {
if (
strlen(trim((string)$append)) == 0) {
$xml = $this->addChild($append->getName());
} else {
$xml = $this->addChild($append->getName(), (string)$append);
}

foreach (
$append->children() as $child) {
$xml->appendXML($child);
}

foreach (
$append->attributes() as $n => $v) {
$xml->addAttribute($n, $v);
}
}
}
}
?>
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