PHP - Manual: DOMDocument

2024-12-21

DOMDocument::__construct »

« DOMComment::__construct

The DOMDocument class

(PHP 5, PHP 7, PHP 8)

简介

Represents an entire HTML or XML document; serves as the root of the document tree.

类摘要

class DOMDocument extends DOMNode implements DOMParentNode {

/* 属性 */

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 = null;

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;

/* 继承的属性 */

public readonly string $nodeName;

public ?string $nodeValue;

public readonly int $nodeType;

public readonly ?DOMNode $parentNode;

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 ?DOMDocument $ownerDocument;

public readonly ?string $namespaceURI;

public string $prefix;

public readonly ?string $localName;

public readonly ?string $baseURI;

public string $textContent;

/* 方法 */

public __construct(string $version = "1.0", string $encoding = "")

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): DOMDocument|bool

public loadHTML(string $source, int $options = 0): DOMDocument|bool

public loadHTMLFile(string $filename, int $options = 0): DOMDocument|bool

public loadXML(string $source, int $options = 0): DOMDocument|bool

public normalizeDocument(): void

public registerNodeClass(string $baseClass, ?string $extendedClass): bool

public relaxNGValidate(string $filename): bool

public relaxNGValidateSource(string $source): bool

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

/* 继承的方法 */

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::getLineNo(): int

public DOMNode::getNodePath(): ?string

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::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

}

属性

actualEncoding: Deprecated. Actual encoding of the document, is a readonly equivalent to encoding.
childElementCount: The number of child elements.
config: Deprecated. Configuration used when DOMDocument::normalizeDocument() is invoked.
doctype: The Document Type Declaration associated with this document.
documentElement: The DOMElement object that is the first document element. If not found, this evaluates to null.
documentURI: The location of the document or null if undefined.
encoding: Encoding of the document, as specified by the XML declaration. This attribute is not present in the final DOM Level 3 specification, but is the only way of manipulating XML document encoding in this implementation.
firstElementChild: First child element or null.
formatOutput: Nicely formats output with indentation and extra space. This has no effect if the document was loaded with preserveWhitespace enabled.
implementation: The DOMImplementation object that handles this document.
lastElementChild: Last child element or null.
preserveWhiteSpace: Do not remove redundant white space. Default to true. Setting this to false has the same effect as passing LIBXML_NOBLANKS as option to DOMDocument::load() etc.
recover: Proprietary. Enables recovery mode, i.e. trying to parse non-well formed documents. This attribute is not part of the DOM specification and is specific to libxml.
resolveExternals: Set it to true to load external entities from a doctype declaration. This is useful for including character entities in your XML document.
standalone: Deprecated. Whether or not the document is standalone, as specified by the XML declaration, corresponds to xmlStandalone.
strictErrorChecking: Throws DOMException on errors. Default to true.
substituteEntities: Proprietary. Whether or not to substitute entities. This attribute is not part of the DOM specification and is specific to libxml.

警告
Enabling entity substitution may facilitate XML External Entity (XXE) attacks.
validateOnParse: Loads and validates against the DTD. Default to false.
version: Deprecated. Version of XML, corresponds to xmlVersion.
xmlEncoding: An attribute specifying, as part of the XML declaration, the encoding of this document. This is null when unspecified or when it is not known, such as when the Document was created in memory.
xmlStandalone: An attribute specifying, as part of the XML declaration, whether this document is standalone. This is false when unspecified.
xmlVersion: An attribute specifying, as part of the XML declaration, the version number of this document. If there is no declaration and if this document supports the "XML" feature, the value is "1.0".

更新日志

版本	说明
8.0.0	DOMDocument implements DOMParentNode now.
8.0.0	The unimplemented method DOMDocument::renameNode() has been removed.

注释

注意:
此 DOM 扩展采用 UTF-8 编码。在 ISO-8859-1 编码下，使用 utf8_encode() 和 utf8_decode() 来处理，其它编码下使用 iconv 函数处理。

注意:
When using json_encode() on a DOMDocument object the result will be that of encoding an empty object.

参见

» W3C specification for Document

DOMDocument::__construct — Creates a new DOMDocument object
DOMDocument::createAttribute — Create new attribute
DOMDocument::createAttributeNS — Create new attribute node with an associated namespace
DOMDocument::createCDATASection — Create new cdata node
DOMDocument::createComment — Create new comment node
DOMDocument::createDocumentFragment — Create new document fragment
DOMDocument::createElement — Create new element node
DOMDocument::createElementNS — Create new element node with an associated namespace
DOMDocument::createEntityReference — Create new entity reference node
DOMDocument::createProcessingInstruction — Creates new PI node
DOMDocument::createTextNode — Create new text node
DOMDocument::getElementById — Searches for an element with a certain id
DOMDocument::getElementsByTagName — Searches for all elements with given local tag name
DOMDocument::getElementsByTagNameNS — Searches for all elements with given tag name in specified namespace
DOMDocument::importNode — Import node into current document
DOMDocument::load — Load XML from a file
DOMDocument::loadHTML — Load HTML from a string
DOMDocument::loadHTMLFile — Load HTML from a file
DOMDocument::loadXML — Load XML from a string
DOMDocument::normalizeDocument — Normalizes the document
DOMDocument::registerNodeClass — Register extended class used to create base node type
DOMDocument::relaxNGValidate — Performs relaxNG validation on the document
DOMDocument::relaxNGValidateSource — Performs relaxNG validation on the document
DOMDocument::save — Dumps the internal XML tree back into a file
DOMDocument::saveHTML — Dumps the internal document into a string using HTML formatting
DOMDocument::saveHTMLFile — Dumps the internal document into a file using HTML formatting
DOMDocument::saveXML — Dumps the internal XML tree back into a string
DOMDocument::schemaValidate — Validates a document based on a schema. Only XML Schema 1.0 is supported.
DOMDocument::schemaValidateSource — Validates a document based on a schema
DOMDocument::validate — Validates the document based on its DTD
DOMDocument::xinclude — Substitutes XIncludes in a DOMDocument Object

add a note

User Contributed Notes 19 notes

down

103

Fernando H ¶

14 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 );
?>

down

developer at nabtron dot com ¶

6 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.

down

tloach at gmail dot com ¶

12 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();

?>

down

jay at jaygilford dot com ¶

12 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;

}

?>

down

Nick M ¶

11 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.

down

evert at er dot nl ¶

11 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;

}

?>

down

cmyk777 at gmail dot com ¶

13 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>

down

andreas at userbrain dot com ¶

7 months 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>
?>

down

pastormontesinos at gmail dot com ¶

1 year 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;
    }
}
?>

down

610010559 at qq dot com ¶

3 months 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.

down

ashjkshdu283 at gmail dot com ¶

3 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));

down

biker dot mike at gmx dot com ¶

5 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.

down

ingjetel at gmail dot com ¶

7 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);
  }
}
?>

down

fcartegnie ¶

12 years ago


Be careful with formatOutput().

Creating an empty node like this:
createElement('foo','')
instead of
createElement('foo')
will break formatOutput.

down

-1

sites.sitesbr.net ¶

9 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;
      
         // ...

   }

?>

down

-3

admin at beerpla dot net ¶

12 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.

down

-3

danny dot nunez15 at gmail dot com ¶

8 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;
    }

down

-3

qrworld.net ¶

7 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();
}

down

-8

PhilipWayneRollins at gmail dot com ¶

12 years ago


If you want to use the DOMDocument to create xHTML documents here is a simple class

Note this is designed for creating xHTML documents from scratch but could be easily extended to work with xHTML documents. Also this is for xHTML not XML.

<?php
    class Document
    {
        public $doctype;
        public $head;
        public $title = 'Sensei Ninja';
        public $body;
        private $styles;
        private $metas;
        private $scripts;
        private $document;
        
        
        function __construct (  )
        {
            $this->document = new DOMDocument( );
            $this->head = $this->document->createElement( 'head', ' ' );
            $this->body = $this->document->createElement( 'body', ' ' );
        }
        
        
        public function addStyleSheet ( $url, $media='all' )
        {
            $element = $this->document->createElement( 'link' );
            $element->setAttribute( 'type', 'text/css' );
            $element->setAttribute( 'href', $url );
            $element->setAttribute( 'media', $media );
            $this->styles[] = $element;
        }
        
        
        public function addScript ( $url )
        {
            $element = $this->document->createElement( 'script', ' ' );
            $element->setAttribute( 'type', 'text/javascript' );
            $element->setAttribute( 'src', $url );
            $this->scripts[] = $element;
        }
        
        
        public function addMetaTag ( $name, $content )
        {
            $element = $this->document->createElement( 'meta' );
            $element->setAttribute( 'name', $name );
            $element->setAttribute( 'content', $content );
            $this->metas[] = $element;
        }
        
        
        public function setDescription ( $dec )
        {
            $this->addMetaTag( 'description', $dec );
        }
        
        
        public function setKeywords ( $keywords )
        {
            $this->addMetaTag( 'keywords', $keywords );
        }
        
        public function createElement ( $nodeName, $nodeValue=null )
        {
          return $this->document->createElement( $nodeName, $nodeValue ); 
        }
        
        public function assemble ( )
        {
            // Doctype creation
            $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML TRANSITIONAL 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">';
            
            // Create the head element
            $title = $this->document->createElement( 'title', $this->title );
            // Add stylesheets if needed
            if ( is_array( $this->styles ))
                foreach ( $this->styles as $element )
                    $this->head->appendChild( $element );
            // Add scripts if needed
            if(  is_array( $this->scripts ))
                foreach ( $this->scripts as $element )
                    $this->head->appendChild( $element );
            // Add meta tags if needed
            if ( is_array( $this->metas ))
                foreach ( $this->metas as $element )
                    $this->head->appendChild( $element );
            $this->head->appendChild( $title );
            
            // Create the document
            $html = $this->document->createElement( 'html' );
            $html->setAttribute( 'xmlns', 'http://www.w3.org/1999/xhtml' );
            $html->setAttribute( 'xml:lang', 'en' );
            $html->setAttribute( 'lang', 'en' );
            $html->appendChild( $this->head );
            $html->appendChild( $this->body );
            
            
            $this->document->appendChild( $html );
            return $doctype . $this->document->saveXML( );
        }
        
    }
    
?>

Small example

<?php
        $document = new Document( );
    $document->title = 'Hello';
    $document->addStyleSheet( 'StyleSheets/main.css' );
    $div = $document->createElement( 'div' );
    $div->nodeValue = 'Hello, world!';
    $div->setAttribute( 'style', 'color: red;' );
    $document->body->appendChild( $div );
    printf( '%s', $document->assemble( ) );
?>

add a note

官方地址：https://www.php.net/manual/en/class.domdocument.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络数据库 JAVA 面试 NoSQL C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 PHP 8.1 adodb手册 ADORecordSet对象 opcache预加载 Composer的Packagist资源 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet PHP json解析（json_decode）页面工具 mysql面试题 [原创]诡异的php-fpm超时问题两千行PHP学习笔记 php中几种注释规范支持php7的性能采集扩展纯php实现DES以及TripleDES加密算法 php 修改图片大小

略微加速

PHP官方手册 - 互联网笔记

The DOMDocument class

简介

类摘要

属性

更新日志

注释

参见

目录

User Contributed Notes 19 notes