PHP Conference Nagoya 2025

    DOMDocument クラス

    (PHP 5, PHP 7, PHP 8)

    はじめに

    HTML ドキュメントあるいは XML ドキュメント全体を表し、 ドキュメントツリーのルートとなります。

    クラス概要

    class DOMDocument extends DOMNode implements DOMParentNode {
    /* プロパティ */
    public readonly ?DOMDocumentType $doctype;
    public readonly DOMImplementation $implementation;
    public readonly ?DOMElement $documentElement;
    public readonly ?string $actualEncoding;
    public ?string $encoding;
    public readonly ?string $xmlEncoding;
    public bool $standalone;
    public bool $xmlStandalone;
    public ?string $version;
    public ?string $xmlVersion;
    public bool $strictErrorChecking;
    public ?string $documentURI;
    public readonly mixed $config;
    public bool $formatOutput;
    public bool $validateOnParse;
    public bool $resolveExternals;
    public bool $preserveWhiteSpace;
    public bool $recover;
    public bool $substituteEntities;
    public readonly ?DOMElement $firstElementChild;
    public readonly ?DOMElement $lastElementChild;
    public readonly int $childElementCount;
    /* 継承したプロパティ */
    public readonly string $nodeName;
    public ?string $nodeValue;
    public readonly int $nodeType;
    public readonly ?DOMNode $parentNode;
    public readonly ?DOMElement $parentElement;
    public readonly DOMNodeList $childNodes;
    public readonly ?DOMNode $firstChild;
    public readonly ?DOMNode $lastChild;
    public readonly ?DOMNode $previousSibling;
    public readonly ?DOMNode $nextSibling;
    public readonly ?DOMNamedNodeMap $attributes;
    public readonly bool $isConnected;
    public readonly ?DOMDocument $ownerDocument;
    public readonly ?string $namespaceURI;
    public string $prefix;
    public readonly ?string $localName;
    public readonly ?string $baseURI;
    public string $textContent;
    /* メソッド */
    public __construct(string $version = "1.0", string $encoding = "")
    public adoptNode(DOMNode $node): DOMNode|false
    public append(DOMNode|string ...$nodes): void
    public createAttribute(string $localName): DOMAttr|false
    public createAttributeNS(?string $namespace, string $qualifiedName): DOMAttr|false
    public createCDATASection(string $data): DOMCdataSection|false
    public createComment(string $data): DOMComment
    public createDocumentFragment(): DOMDocumentFragment
    public createElement(string $localName, string $value = ""): DOMElement|false
    public createElementNS(?string $namespace, string $qualifiedName, string $value = ""): DOMElement|false
    public createEntityReference(string $name): DOMEntityReference|false
    public createProcessingInstruction(string $target, string $data = ""): DOMProcessingInstruction|false
    public createTextNode(string $data): DOMText
    public getElementById(string $elementId): ?DOMElement
    public getElementsByTagName(string $qualifiedName): DOMNodeList
    public getElementsByTagNameNS(?string $namespace, string $localName): DOMNodeList
    public importNode(DOMNode $node, bool $deep = false): DOMNode|false
    public load(string $filename, int $options = 0): bool
    public loadHTML(string $source, int $options = 0): bool
    public loadHTMLFile(string $filename, int $options = 0): bool
    public loadXML(string $source, int $options = 0): bool
    public normalizeDocument(): void
    public prepend(DOMNode|string ...$nodes): void
    public registerNodeClass(string $baseClass, ?string $extendedClass): true
    public relaxNGValidate(string $filename): bool
    public relaxNGValidateSource(string $source): bool
    public replaceChildren(DOMNode|string ...$nodes): void
    public save(string $filename, int $options = 0): int|false
    public saveHTML(?DOMNode $node = null): string|false
    public saveHTMLFile(string $filename): int|false
    public saveXML(?DOMNode $node = null, int $options = 0): string|false
    public schemaValidate(string $filename, int $flags = 0): bool
    public schemaValidateSource(string $source, int $flags = 0): bool
    public validate(): bool
    public xinclude(int $options = 0): int|false
    /* 継承したメソッド */
    public DOMNode::appendChild(DOMNode $node): DOMNode|false
    public DOMNode::C14N(
        bool $exclusive = false,
        bool $withComments = false,
        ?array $xpath = null,
        ?array $nsPrefixes = null
    ): string|false
    public DOMNode::C14NFile(
        string $uri,
        bool $exclusive = false,
        bool $withComments = false,
        ?array $xpath = null,
        ?array $nsPrefixes = null
    ): int|false
    public DOMNode::cloneNode(bool $deep = false): DOMNode|false
    public DOMNode::compareDocumentPosition(DOMNode $other): int
    public DOMNode::contains(DOMNode|DOMNameSpaceNode|null $other): bool
    public DOMNode::getLineNo(): int
    public DOMNode::getNodePath(): ?string
    public DOMNode::getRootNode(?array $options = null): DOMNode
    public DOMNode::hasAttributes(): bool
    public DOMNode::hasChildNodes(): bool
    public DOMNode::insertBefore(DOMNode $node, ?DOMNode $child = null): DOMNode|false
    public DOMNode::isDefaultNamespace(string $namespace): bool
    public DOMNode::isEqualNode(?DOMNode $otherNode): bool
    public DOMNode::isSameNode(DOMNode $otherNode): bool
    public DOMNode::isSupported(string $feature, string $version): bool
    public DOMNode::lookupNamespaceURI(?string $prefix): ?string
    public DOMNode::lookupPrefix(string $namespace): ?string
    public DOMNode::normalize(): void
    public DOMNode::removeChild(DOMNode $child): DOMNode|false
    public DOMNode::replaceChild(DOMNode $node, DOMNode $child): DOMNode|false
    public DOMNode::__sleep(): array
    public DOMNode::__wakeup(): void
    }

    プロパティ

    actualEncoding

    非推奨。ドキュメントの実際のエンコーディング。 読み込み専用で、 encoding と同等の内容です。

    childElementCount

    子要素の数

    config

    非推奨。 DOMDocument::normalizeDocument() を実行する際に使用する設定。

    doctype

    このドキュメントに関連付けられた文書型宣言

    documentElement

    最初のドキュメント要素を示す DOMElement オブジェクト。 存在しない場合は null になります。

    documentURI

    ドキュメントの位置。未定義の場合は null

    encoding

    XML 宣言で指定したドキュメントのエンコーディング。 この属性は、DOM Level 3 の最終的な仕様には存在しません。 しかし、この実装で XML ドキュメントのエンコーディングを扱うにはこれを使用するしかありません。

    firstElementChild

    最初の子要素。存在しない場合は null になります。

    formatOutput

    字下げや空白を考慮してきれいに整形した出力を行う。 これは、ドキュメントを preserveWhitespace を有効にして読み込んだ場合は効果がありません。

    implementation

    このドキュメントを処理する DOMImplementation オブジェクト

    lastElementChild

    最後の子要素。存在しない場合は null になります。

    preserveWhiteSpace

    余分な空白を取り除かない。デフォルトは true false に設定すると、 DOMDocument::load() の option に LIBXML_NOBLANKS を渡すのと同じ効果があります。

    recover

    非標準。 リカバリーモードを有効にし、整形式でないドキュメントのパースを試みます。 この属性は DOM の仕様にはなく、libxml 固有の独自仕様です。

    resolveExternals

    文書型宣言で外部エンティティを読み込む際に true を設定する。 XML ドキュメントに文字エンティティを含める際に便利です。

    standalone

    非推奨。 そのドキュメントがスタンドアローンかどうかを XML 宣言で指定したもの。 xmlStandalone に対応します。

    strictErrorChecking

    エラー時に DOMException をスローする。デフォルトは true

    substituteEntities

    非標準。 エンティティの置換を行うかどうか。 この属性は DOM の仕様にはなく、libxml 固有の独自仕様です。 デフォルトは false です。

    警告

    エンティティの置換を有効にすると、XML外部エンティティ参照攻撃(XXE) を容易にしてしまうかもしれません。

    validateOnParse

    DTD を読み込んで検証する。デフォルトは false

    警告

    DTD の検証を有効にすると、XML外部エンティティ参照攻撃(XXE) を容易にしてしまうかもしれません。

    version

    非推奨。 XML のバージョン。 xmlVersion に対応します。

    xmlEncoding

    XML 宣言の一部として、このドキュメントのエンコーディングを 指定する属性。指定されていない場合や不明な場合 (たとえば ドキュメントがメモリ上に存在する場合など) は null

    xmlStandalone

    XML 宣言の一部として、このドキュメントがスタンドアローンか どうかを指定する。指定されていない場合は false スタンドアローンドキュメントとは、 外部のマークアップ宣言を持たないドキュメントのことです。 スタンドアローンドキュメントの例としては、 DTD がデフォルトの値で宣言されているものが挙げられます。

    xmlVersion

    XML 宣言の一部として、このドキュメントのバージョン番号を指定する。 バージョン番号が定義されておらず、ドキュメントが "XML" の機能を サポートしている場合は、値は "1.0"

    変更履歴

    バージョン 説明
    8.0.0 DOMDocument は、 DOMParentNode を実装しました。
    8.0.0 実装されていなかったメソッド DOMDocument::renameNode() が削除されました。

    注意

    注意:

    DOM拡張モジュール は UTF-8 エンコーディングを使います。他のエンコーディングを扱う場合は、mb_convert_encoding(), UConverter::transcode(), iconv() を使ってください。

    注意:

    DOMDocument オブジェクトに対して json_encode() を使うと、結果は空オブジェクトをエンコードしたものになります。

    参考

    目次

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    ＋add a note

    User Contributed Notes 19 notes

    up
    113
    Fernando H
    16 years ago
    Showing a quick example of how to use this class, just so that new users can get a quick start without having to figure it all out by themself. ( At the day of posting, this documentation just got added and is lacking examples. )

    <?php

    // Set the content type to be XML, so that the browser will recognise it as XML.
    header( "content-type: application/xml; charset=ISO-8859-15" );

    // "Create" the document.
    $xml = new DOMDocument( "1.0", "ISO-8859-15" );

    // Create some elements.
    $xml_album = $xml->createElement( "Album" );
    $xml_track = $xml->createElement( "Track", "The ninth symphony" );

    // Set the attributes.
    $xml_track->setAttribute( "length", "0:01:15" );
    $xml_track->setAttribute( "bitrate", "64kb/s" );
    $xml_track->setAttribute( "channels", "2" );

    // Create another element, just to show you can add any (realistic to computer) number of sublevels.
    $xml_note = $xml->createElement( "Note", "The last symphony composed by Ludwig van Beethoven." );

    // Append the whole bunch.
    $xml_track->appendChild( $xml_note );
    $xml_album->appendChild( $xml_track );

    // Repeat the above with some different values..
    $xml_track = $xml->createElement( "Track", "Highway Blues" );

    $xml_track->setAttribute( "length", "0:01:33" );
    $xml_track->setAttribute( "bitrate", "64kb/s" );
    $xml_track->setAttribute( "channels", "2" );
    $xml_album->appendChild( $xml_track );

    $xml->appendChild( $xml_album );

    // Parse the XML.
    print $xml->saveXML();

    ?>

    Output:
    <Album>
    <Track length="0:01:15" bitrate="64kb/s" channels="2">
    The ninth symphony
    <Note>
    The last symphony composed by Ludwig van Beethoven.
    </Note>
    </Track>
    <Track length="0:01:33" bitrate="64kb/s" channels="2">Highway Blues</Track>
    </Album>

    If you want your PHP->DOM code to run under the .xml extension, you should set your webserver up to run the .xml extension with PHP ( Refer to the installation/configuration configuration for PHP on how to do this ).

    Note that this:
    <?php
    $xml     = new DOMDocument( "1.0", "ISO-8859-15" );
    $xml_album = $xml->createElement( "Album" );
    $xml_track = $xml->createElement( "Track" );
    $xml_album->appendChild( $xml_track );
    $xml->appendChild( $xml_album );
    ?>

    is NOT the same as this:
    <?php
    // Will NOT work.
    $xml = new DOMDocument( "1.0", "ISO-8859-15" );
    $xml_album = new DOMElement( "Album" );
    $xml_track = new DOMElement( "Track" );
    $xml_album->appendChild( $xml_track );
    $xml->appendChild( $xml_album );
    ?>

    although this will work:
    <?php
    $xml     = new DOMDocument( "1.0", "ISO-8859-15" );
    $xml_album = new DOMElement( "Album" );
    $xml->appendChild( $xml_album );
    ?>
    up
    23
    developer at nabtron dot com
    8 years ago
    For those landing here and checking for encoding issue with utf-8 characteres, it's pretty easy to correct it, without adding any additional output tag to your html.

    We'll be utilizing: mb_convert_encoding

    Thanks to the user who shared: SmartDOMDocument in previous comments, I got the idea of solving it. However I truly wish that he shared the method instead of giving a link.

    Anyway coming back to the solution, you can simply use:

    <?php

    // checks if the content we're receiving isn't empty, to avoid the warning
    if ( empty( $content ) ) {
    return     false;
    }

    // converts all special characters to utf-8
    $content = mb_convert_encoding($content, 'HTML-ENTITIES', 'UTF-8');

    // creating new document
    $doc = new DOMDocument('1.0', 'utf-8');

    //turning off some errors
    libxml_use_internal_errors(true);

    // it loads the content without adding enclosing html/body tags and also the doctype declaration
    $doc->LoadHTML($content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

    // do whatever you want to do with this code now

    ?>

    I hope it solves the issue for someone! If you need my help or service to fix your code, you can reach me on nabtron.com or contact me at the email mentioned with this comment.
    up
    23
    jay at jaygilford dot com
    14 years ago
    Here's a small function I wrote to get all page links using the DOMDocument which will hopefully be of use to others

    <?php
    /**
    * @author Jay Gilford
    */

    /**
    * get_links()
    *
    * @param string $url
    * @return array
    */
    function get_links($url) {

    // Create a new DOM Document to hold our webpage structure
    $xml = new DOMDocument();

    // Load the url's contents into the DOM
    $xml->loadHTMLFile($url);

    // Empty array to hold all links to return
    $links = array();

    //Loop through each <a> tag in the dom and add it to the link array
    foreach($xml->getElementsByTagName('a') as $link) {
    $links[] = array('url' => $link->getAttribute('href'), 'text' => $link->nodeValue);
    }

    //Return the links
    return $links;
    }
    ?>
    up
    4
    andreas at userbrain dot com
    3 years ago
    After struggling with parsing and modifying partial HTML content for several hours, I came to this solution which does work for me and is relatively simple compared to what else I found online.

    This solution fixes unwanted DOCTYPE and html, body tags as well as encoding issues.

    <?php

    // Assumption: content is utf-8 encoded
    $content = "<h1>This is a heading</h1><p>This is a paragraph</p>";

    // Load content to a div and specify encoding with a meta tag
    $temp_dom = new DOMDocument();
    $temp_dom->loadHTML("<meta http-equiv='Content-Type' content='charset=utf-8' /><div>$content</div>");

    // As loadHTML() adds a DOCTYPE as well as <html> and <body> tag, let’s create another DOMDocument and import just the nodes we want
    $dom = new DOMDocument();
    $first_div = $temp_dom->getElementsByTagName('div')[0];
    $first_div_node = $dom->importNode($first_div, true);
    $dom->appendChild($first_div_node);

    // Do whatever you want to do
    $dom->getElementsByTagName('h1')[0]->setAttribute('class', 'happy');

    // You could also just echo $dom->saveHtml() if you don’t mind the div and whitespace
    echo substr(trim($dom->saveHtml()), 5, -6);

    // Outputs: <h1 class="happy">This is a heading</h1><p>This is a paragraph</p>
    ?>
    up
    13
    tloach at gmail dot com
    14 years ago
    For anyone else who has been having issues with formatOuput not working, here is a work-around:

    rather than just doing something like:

    <?php
    $outXML     = $xml->saveXML();
    ?>

    force it to reload the XML from scratch, then it will format correctly:

    <?php
    $outXML     = $xml->saveXML();
    $xml = new DOMDocument();
    $xml->preserveWhiteSpace = false;
    $xml->formatOutput = true;
    $xml->loadXML($outXML);
    $outXML = $xml->saveXML();
    ?>
    up
    3
    biker dot mike at gmx dot com
    8 years ago
    Look out for the following gotcha when loading XML from a string:

    <?php
    $doc     = new \DOMDocument;
    $doc->documentURI = $myXmlFilename;
    $doc->loadXML($myXmlString);
    ?>

    documentURI is now set to the value of $myXmlFilename, right?

    Wrong!

    It's set to the current working directory. If you want to manually set documentURI to something other than the CWD, do so AFTER the call to loadXML().

    E.g.:
    <?php
    $doc     = new \DOMDocument;
    $doc->loadXML($myXmlString);
    $doc->documentURI = $myXmlFilename;
    ?>

    documentURI really is now set to the value of $myXmlFilename.
    up
    6
    Nick M
    13 years ago
    You may need to save all or part of a DOMDocument as an XHTML-friendly string, something compliant with both XML and HTML 4. Here's the DOMDocument class extended with a saveXHTML method:

    <?php

    /**
    * XHTML Document
    *
    * Represents an entire XHTML DOM document; serves as the root of the document tree.
    */
    class XHTMLDocument extends DOMDocument {

    /**
    * These tags must always self-terminate. Anything else must never self-terminate.
    *
    * @var array
    */
    public $selfTerminate = array(
    'area','base','basefont','br','col','frame','hr','img','input','link','meta','param'
    );

    /**
    * saveXHTML
    *
    * Dumps the internal XML tree back into an XHTML-friendly string.
    *
    * @param DOMNode $node
    * Use this parameter to output only a specific node rather than the entire document.
    */
    public function saveXHTML(DOMNode $node=null) {

    if (!    $node) $node = $this->firstChild;

    $doc = new DOMDocument('1.0');
    $clone = $doc->importNode($node->cloneNode(false), true);
    $term = in_array(strtolower($clone->nodeName), $this->selfTerminate);
    $inner='';

    if (!    $term) {
    $clone->appendChild(new DOMText(''));
    if (    $node->childNodes) foreach ($node->childNodes as $child) {
    $inner .= $this->saveXHTML($child);
    }
    }

    $doc->appendChild($clone);
    $out = $doc->saveXML($clone);

    return     $term ? substr($out, 0, -2) . ' />' : str_replace('><', ">$inner<", $out);

    }

    }

    ?>

    This hasn't been benchmarked, but is probably significantly slower than saveXML or saveHTML and should be used sparingly.
    up
    1
    pastormontesinos at gmail dot com
    3 years ago
    For using safely with script nodes when parsing, best option is extending DOMDocument, keeping script tags while DOMDocument process and rearrange them just after saveHTML function is called. Here is my custom class.

    <?php

    class SafeDOMDocument extends \DOMDocument
    {
    const     REGEX_JS = '#(\s*<!--(\[if[^\n]*>)?\s*(<script.*</script>)+\s*(<!\[endif\])?-->)|(\s*<script.*</script>)#isU';
    const     SUBSTITUTION_FORMAT = '<!--<script class="script_%s"></script>-->';
    private     $matchedScripts = [];

    public function     loadHTML($source, $options = 0)
    {
    $this->formatOutput = false;
    $this->preserveWhiteSpace = true;
    $this->validateOnParse = false;
    $this->strictErrorChecking = false;
    $this->recover = false;
    $this->resolveExternals = false;
    $this->substituteEntities = false;
    $matches = [];
    $success = preg_match_all(self::REGEX_JS, $source, $matches);

    if (    $success && !empty($matches)) {
    foreach (    $matches[0] as $match) {
    $storedScript = rtrim(ltrim($match, "\n\r\t "), "\n\r\t ");
    $scriptId = md5($storedScript);
    $key = sprintf(self::SUBSTITUTION_FORMAT, $scriptId);
    $source = str_replace($match, $key, $source);
    $this->matchedScripts[$key] = $storedScript;
    }
    }

    return     parent::loadHTML($source, $options);
    }

    public function     saveHTML(DOMNode $node = null)
    {
    $output = parent::saveHTML($node);

    if (    count($this->matchedScripts)) {
    foreach (    $this->matchedScripts as $substitution => $originalSnippet) {
    $output = str_replace($substitution, $originalSnippet, $output);
    }
    }

    return     $output;
    }
    }
    ?>
    up
    7
    evert at er dot nl
    14 years ago
    A nice and simple node 2 array I wrote, worth a try ;)

    <?php
    function getArray($node)
    {
    $array = false;

    if (    $node->hasAttributes())
    {
    foreach (    $node->attributes as $attr)
    {
    $array[$attr->nodeName] = $attr->nodeValue;
    }
    }

    if (    $node->hasChildNodes())
    {
    if (    $node->childNodes->length == 1)
    {
    $array[$node->firstChild->nodeName] = $node->firstChild->nodeValue;
    }
    else
    {
    foreach (    $node->childNodes as $childNode)
    {
    if (    $childNode->nodeType != XML_TEXT_NODE)
    {
    $array[$childNode->nodeName][] = $this->getArray($childNode);
    }
    }
    }
    }

    return     $array;
    }
    ?>
    up
    4
    fcartegnie
    15 years ago
    Be careful with formatOutput().

    Creating an empty node like this:
    createElement('foo','')
    instead of
    createElement('foo')
    will break formatOutput.
    up
    1
    devour at php dot net
    2 months ago
    While DOMDocument can technically be used to parse HTML, it is not ideal for HTML documents and is better suited for processing well-formed XML. One of the primary issues with using DOMDocument for HTML is its strict handling of special characters, such as the ampersand (&).

    DOMDocument requires that ampersands be escaped as &amp;, which is in line with XML standards but can be counterintuitive for handling real-world HTML, where raw & characters are commonly found, especially in URLs and text. This behavior stems from the underlying XML-based parser (libxml), which treats HTML with the same strictness as XML.

    This problem has been reported as far back as 2001, yet the same parsing errors continue to occur when using DOMDocument on HTML documents today.

    A common workaround developers use is to suppress the error reporting from DOMDocument, particularly when parsing errors like unescaped ampersands occur. However, suppressing these errors is not recommended, especially in production environments, as it can hide important issues and pose potential security risks. Ignoring or suppressing errors can leave warnings unnoticed, which may result in vulnerabilities if not properly addressed.

    For these reasons, it's advisable to use DOMDocument primarily for XML documents, or to consider more appropriate libraries when working with HTML to avoid these issues.

    theCoder / MV
    up
    1
    cmyk777 at gmail dot com
    15 years ago
    This function may help to debug current dom element:

    <?php
    function dom_dump($obj) {
    if (    $classname = get_class($obj)) {
    $retval = "Instance of $classname, node list: \n";
    switch (    true) {
    case (    $obj instanceof DOMDocument):
    $retval .= "XPath: {$obj->getNodePath()}\n".$obj->saveXML($obj);
    break;
    case (    $obj instanceof DOMElement):
    $retval .= "XPath: {$obj->getNodePath()}\n".$obj->ownerDocument->saveXML($obj);
    break;
    case (    $obj instanceof DOMAttr):
    $retval .= "XPath: {$obj->getNodePath()}\n".$obj->ownerDocument->saveXML($obj);
    //$retval .= $obj->ownerDocument->saveXML($obj);
    break;
    case (    $obj instanceof DOMNodeList):
    for (    $i = 0; $i < $obj->length; $i++) {
    $retval .= "Item #$i, XPath: {$obj->item($i)->getNodePath()}\n".
    "{$obj->item($i)->ownerDocument->saveXML($obj->item($i))}\n";
    }
    break;
    default:
    return     "Instance of unknown class";
    }
    } else {
    return     'no elements...';
    }
    return     htmlspecialchars($retval);
    }
    ?>

    Example usage:

    <?php
    $dom     = new DomDocument();
    $dom->load('test.xml');
    $body = $dom->documentElement->getElementsByTagName('book');
    echo     '<pre>'.dom_dump($body).'<pre>';
    ?>

    Output:

    Instance of DOMNodeList, node list:
    Item #0, XPath: /library/book[1]
    <book isbn="0345342968">
    <title>Fahrenheit 451</title>
    <author>R. Bradbury</author>
    <publisher>Del Rey</publisher>
    </book>
    Item #1, XPath: /library/book[2]
    <book isbn="0048231398">
    <title>The Silmarillion</title>
    <author>J.R.R. Tolkien</author>
    <publisher>G. Allen &amp; Unwin</publisher>
    </book>
    Item #2, XPath: /library/book[3]
    <book isbn="0451524934">
    <title>1984</title>
    <author>G. Orwell</author>
    <publisher>Signet</publisher>
    </book>
    Item #3, XPath: /library/book[4]
    <book isbn="031219126X">
    <title>Frankenstein</title>
    <author>M. Shelley</author>
    <publisher>Bedford</publisher>
    </book>
    Item #4, XPath: /library/book[5]
    <book isbn="0312863551">
    <title>The Moon Is a Harsh Mistress</title>
    <author>R. A. Heinlein</author>
    <publisher>Orb</publisher>
    </book>
    up
    1
    sites.sitesbr.net
    11 years ago
    How to objetify a DomDocument with hierarchy like:
    <root>
    <item>
    <prop1>info1</prop1>
    <prop2>info2</prop2>
    <prop3>info3</prop3>
    </item>
    <item>
    <prop1>info1</prop1>
    <prop2>info2</prop2>
    <prop3>info3</prop3>
    </item>
    </root>

    It's possible to use in object style to retrieve information, as:

    <?php
    $theNodeValue     = $aitem->prop1;
    ?>

    Here is the code: one Class and 2 functions.

    <?php
    class ArrayNode{
    public     $nodeName, $nodeValue;
    }

    function     getChildNodeElements( $domNode ){
    $nodes = array();
    for(     $i=0; $i < $domNode->childNodes->length; $i++){
    $cn = $domNode->childNodes->item($i);
    if(     $cn->nodeType == 1){
    $nodes[] = $cn;
    }
    }
    return     $nodes;
    }

    function     getArrayNodes( $domDoc ){
    $res = array();

    for(     $i=0; $i < $domDoc->childNodes->length; $i++){
    $cn = $domDoc->childNodes->item($i);
    # The first is the root tag...
    if( $cn->nodeType == 1){
    # But we want it's childNodes.
    $sub_cn = getChildNodeElements( $cn);
    # Found the tagName:
    $baseItemTagName = $sub_cn[0]->nodeName;
    break;
    }
    }

    $dnl = $domDoc->getElementsByTagName( $baseItemTagName);

    for(     $i=0; $i< $dnl->length; $i++){
    $arrayNode = new ArrayNode();

    # Summary
    $arrayNode->nodeName = $dnl->item($i)->nodeName;
    $arrayNode->nodeValue = $dnl->item($i)->nodeValue;

    # Child Nodes
    $cn = $dnl->item($i)->childNodes;
    for(     $k=0; $k<$cn->length; $k++){
    if(     $cn->item($k)->nodeName == "#text" && trim($cn->item($k)->nodeValue) == "") continue;
    $arrayNode->{$cn->item($k)->nodeName} = $cn->item($k)->nodeValue;
    }

    # Attributes
    $attr = $dnl->item($i)->attributes;
    for(     $k=0; $k < $attr->length; $k++){
    if(!     is_null($attr)){
    if(     $attr->item($k)->nodeName == "#text" && trim($attr->item($k)->nodeValue) == "") continue;
    $arrayNode->{$attr->item($k)->nodeName} = $attr->item($k)->nodeValue;
    }
    }

    $res[] = $arrayNode;

    }

    return     $res;
    }
    ?>

    To use it:

    <?php

    # First you load a XML in a DomDocument variable.

    $url = "/path/to/yourxmlfile.xml";
    $domSrc = file_get_contents($url);
    $dom = new DomDocument();
    $dom->loadXML( $domSrc );

    # Then, you get the ArrayNodes from the DomDocument.

    $ans = getArrayNodes( $dom );


    for(     $i=0; $i < count( $ans ) ; $i++){

    $cn = $ans[ $i];

    $info1 = $cn->prop1;
    $info2 = $cn->prop2;
    $info3 = $cn->prop3;

    // ...

    }

    ?>
    up
    0
    610010559 at qq dot com
    2 years ago
    when you add the new element to formatted XML data through appendChild() method, you would the new element you add is not be formatted(that is not indexed, not line break). here is my solution (in short load the xml without preserve white space, ), example show as below:
    <?php
    $doc     = new \DOMDocument();
    $doc->formatOutput = true;
    $doc->preserveWhiteSpace = false;//that is key, default value is true.
    $doc->loadXML($xmlStr);
    $doc->appendChild($doc->createElement('php', '666'))
    $formattedXMLStr = $doc->saveXML();//DOMDocument wold format the xml str for you
    echo $formattedXMlStr;
    ?>
    it take me some time to try it out. hope it save your time.
    up
    0
    ashjkshdu283 at gmail dot com
    6 years ago
    /* Function evolved from jay at jaygilford dot com post
    * This function will return an array of the values of the specified
    * attribute ($attr) for all the Dom Document object's elements
    */

    <?php

    function getAttrData(string $attr, DomDocument $dom) {
    // Empty array to hold all classes to return
    $attrData = array();

    //Loop through each tag in the dom and add it's attribute data to the array
    foreach($dom->getElementsByTagName('*') as $tag) {
    if(empty(    $tag->getAttribute($attr)) === false) {
    array_push($attrData, $tag->getAttribute($attr));
    }
    }

    //Return the array of attribute data
    return array_unique($attrData);
    }

    $html = '
    <!DOCTYPE html>
    <html>
    <head>
    <title>Page Title</title>
    </head>
    <body>
    <a href="#someLink" id="someLink" class="link-class">Some Link</a>
    <a href="#someOtherLink" id="someOtherLink" class="link-class">Some Other Link</a>
    <h1 id="header1" class="header-class">My First Heading</h1>
    <p id="para1" class="para-class">My first paragraph.</p>
    </body>
    </html>'    ;
    $dom = new DOMDocument();
    $dom->loadHtml($html);
    $dom->saveHTML();
    var_dump(getAttrData('class', $dom));
    up
    0
    ingjetel at gmail dot com
    9 years ago
    Easy function for basic output of XML file via DOM parsing

    <?php
    $dom     = new DomDocument();
    $dom->load("./file.xml") or die("error");
    $start = $dom->documentElement;
    fc($start);

    function     fc($node) {
    $child = $node->childNodes;
    foreach(    $child as $item) {
    if (    $item->nodeType == XML_TEXT_NODE) {
    if (    strlen(trim($item->nodeValue))) echo trim($item->nodeValue)."<br/>";
    }
    else if (    $item->nodeType == XML_ELEMENT_NODE) fc($item);
    }
    }
    ?>
    up
    -1
    danny dot nunez15 at gmail dot com
    11 years ago
    A simple function to grab all links in a page.

    function get_links($url) {

    // Create a new DOM Document to hold our webpage structure
    $xml = new DOMDocument();

    // Load the url's contents into the DOM

    $xml->loadHTMLFile($url);

    // Empty array to hold all links to return
    $links = array();

    //Loop through each <a> tag in the dom and add it to the link array
    foreach ($xml->getElementsByTagName('a') as $link) {
    $url = $link->getAttribute('href');
    if (!empty($url)) {
    $links[] = $link->getAttribute('href');
    }
    }

    //Return the links
    return $links;
    }
    up
    -2
    admin at beerpla dot net
    14 years ago
    After seeing many complaints about certain DOMDocument shortcomings, such as bad handling of encodings and always saving HTML fragments with <html>, <head>, and DOCTYPE, I decided that a better solution is needed.

    So here it is: SmartDOMDocument. You can find it at http://beerpla.net/projects/smartdomdocument/

    Currently, the main highlights are:

    - SmartDOMDocument inherits from DOMDocument, so it's very easy to use - just declare an object of type SmartDOMDocument instead of DOMDocument and enjoy the new behavior on top of all existing functionality (see example below).

    - saveHTMLExact() - DOMDocument has an extremely badly designed "feature" where if the HTML code you are loading does not contain <html> and <body> tags, it adds them automatically (yup, there are no flags to turn this behavior off).
    Thus, when you call $doc->saveHTML(), your newly saved content now has <html><body> and DOCTYPE in it. Not very handy when trying to work with code fragments (XML has a similar problem).
    SmartDOMDocument contains a new function called saveHTMLExact() which does exactly what you would want - it saves HTML without adding that extra garbage that DOMDocument does.

    - encoding fix - DOMDocument notoriously doesn't handle encoding (at least UTF-8) correctly and garbles the output.
    SmartDOMDocument tries to work around this problem by enhancing loadHTML() to deal with encoding correctly. This behavior is transparent to you - just use loadHTML() as you would normally.

    - SmartDOMDocument Object As String - you can use a SmartDOMDocument object as a string which will print out its contents.
    For example:
    <?php
    echo "Here is the HTML: $smart_dom_doc";
    ?>

    I'm going to maintain this code and try to fix bugs as they come in.

    Enjoy.
    up
    -5
    qrworld.net
    10 years ago
    In this post http://softontherocks.blogspot.com/2014/11/descargar-el-contenido-de-una-url_11.html I found a simple way to get the content of a URL with DOMDocument, loadHTMLFile and saveHTML().

    function getURLContent($url){
    $doc = new DOMDocument;
    $doc->preserveWhiteSpace = FALSE;
    @$doc->loadHTMLFile($url);
    return $doc->saveHTML();
    }
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