XXX. DOM Functions

简介

The DOM extension allows you to operate on XML documents through the DOM API with PHP 5.

For PHP 4, use DOM XML.

安装

本扩展模块作为 PHP 内核的一部分，无需安装即可使用。

预定义类

The API of the module follows the DOM Level 3 standard as closely as possible. Consequently, the API is fully object-oriented. It is a good idea to have the DOM standard available when using this module.

This module defines a number of classes, which are explained in the following tables. Classes with an equivalent in the DOM standard are named DOMxxx.

DOMAttr

Extends DOMNode. The DOMAttr interface represents an attribute in an DOMElement object.

构造函数

DOMAttr->__construct() - construct a new DOMAttr object

方法

DOMAttr->isId() - Checks if attribute is a defined ID

属性

表 1.

Name	Type	Read-only	Description
name	string	yes	The name of the attribute
ownerElement	DOMElement	yes	The element which contains the attribute
schemaTypeInfo	bool	yes	Not implemented yet, always return `NULL`
specified	bool	yes	Not implemented yet, always return `NULL`
value	string	no	The value of the attribute

DOMCharacterData

Extends DOMNode.

方法

DOMCharacterData->appendData() - Append a string to the end of the character data of the node
DOMCharacterData->deleteData() - Remove a range of characters from the node
DOMCharacterData->insertData() - Insert a string at the specified 16-bit unit offset
DOMCharacterData->replaceData() - Replace a substring within the DOMCharacterData node
DOMCharacterData->substringData() - Extracts a range of data from the node

属性

表 2.

Name	Type	Read-only	Description
data	string	no	The contents of the node
length	int	yes	The length of the contents

DOMComment

Extends DOMCharacterData.

构造函数

DOMComment->__construct() - construct a new DOMComment object

DOMDocument

Extends DOMNode.

构造函数

DOMDocument->__construct() - construct a new DOMDocument object

方法

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 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->relaxNGValidate() - Performs relaxNG validation on the document
DOMDocument->relaxNGValidateSource() - Performs relaxNG validation on the document
DOMDocument->registerNodeClass() - Register extended class used to create base node type (not DOM standard)
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 back 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
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

属性

表 3.

Name	Type	Read-only	Description
actualEncoding	string	yes
config	DOMConfiguration	yes
doctype	DOMDocumentType	yes	The Document Type Declaration associated with this document.
documentElement	DOMElement	yes	This is a convenience attribute that allows direct access to the child node that is the document element of the document.
documentURI	string	no	The location of the document or `NULL` if undefined.
encoding	string	no
formatOutput	bool	no
implementation	DOMImplementation	yes	The DOMImplementation object that handles this document.
preserveWhiteSpace	bool	no	Do not remove redundant white space. Default to `TRUE`.
recover	bool	no
resolveExternals	bool	no	Set it to `TRUE` to load external entities from a doctype declaration. This is useful for including character entities in your XML document.
standalone	bool	no
strictErrorChecking	bool	no	Throws DOMException on errors. Default to `TRUE`.
substituteEntities	bool	no
validateOnParse	bool	no	Loads and validates against the DTD. Default to `FALSE`.
version	string	no
xmlEncoding	string	yes	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	bool	no	An attribute specifying, as part of the XML declaration, whether this document is standalone. This is `FALSE` when unspecified.
xmlVersion	string	no	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".

DOMDocumentFragment

Extends DOMNode.

方法

DOMDocumentFragment->appendXML() - Append raw XML data (not DOM standard)

DOMDocumentType

Extends DOMNode

Each DOMDocument has a doctype attribute whose value is either NULL or a DOMDocumentType object.

属性

表 4.

Name	Type	Read-only	Description
publicId	string	yes	The public identifier of the external subset.
systemId	string	yes	The system identifier of the external subset. This may be an absolute URI or not.
name	string	yes	The name of DTD; i.e., the name immediately following the `DOCTYPE` keyword.
entities	DOMNamedNodeMap	yes	A DOMNamedNodeMap containing the general entities, both external and internal, declared in the DTD.
notations	DOMNamedNodeMap	yes	A DOMNamedNodeMap containing the notations declared in the DTD.
internalSubset	string	yes	The internal subset as a string, or null if there is none. This is does not contain the delimiting square brackets.

DOMElement

Extends DOMNode.

构造函数

DOMElement->__construct() - construct a new DOMElement object

方法

DOMElement->getAttribute() - Returns value of attribute
DOMElement->getAttributeNode() - Returns attribute node
DOMElement->getAttributeNodeNS() - Returns attribute node
DOMElement->getAttributeNS() - Returns value of attribute
DOMElement->getElementsByTagName() - Gets elements by tagname
DOMElement->getElementsByTagNameNS() - Get elements by namespaceURI and localName
DOMElement->hasAttribute() - Checks to see if attribute exists
DOMElement->hasAttributeNS() - Checks to see if attribute exists
DOMElement->removeAttribute() - Removes attribute
DOMElement->removeAttributeNode() - Removes attribute
DOMElement->removeAttributeNS() - Removes attribute
DOMElement->setAttribute() - Adds new attribute
DOMElement->setAttributeNode() - Adds new attribute node to element
DOMElement->setAttributeNodeNS() - Adds new attribute node to element
DOMElement->setAttributeNS() - Adds new attribute
DOMElement->setIdAttribute() - Declares the ID attribute
DOMElement->setIdAttributeNode() - Declares the ID attribute
DOMElement->setIdAttributeNS() - Declares the ID attribute

属性

表 5.

Name	Type	Read-only	Description
schemaTypeInfo	bool	yes	Not implemented yet, always return `NULL`
tagName	string	yes	The element name

DOMEntity

Extends DOMNode

This interface represents a known entity, either parsed or unparsed, in an XML document.

属性

表 6.

Name	Type	Read-only	Description
publicId	string	yes	The public identifier associated with the entity if specified, and `NULL` otherwise.
systemId	string	yes	The system identifier associated with the entity if specified, and `NULL` otherwise. This may be an absolute URI or not.
notationName	string	yes	For unparsed entities, the name of the notation for the entity. For parsed entities, this is `NULL`.
actualEncoding	string	no	An attribute specifying the encoding used for this entity at the time of parsing, when it is an external parsed entity. This is `NULL` if it an entity from the internal subset or if it is not known.
encoding	string	yes	An attribute specifying, as part of the text declaration, the encoding of this entity, when it is an external parsed entity. This is `NULL` otherwise.
version	string	yes	An attribute specifying, as part of the text declaration, the version number of this entity, when it is an external parsed entity. This is `NULL` otherwise.

DOMEntityReference

Extends DOMNode.

构造函数

DOMEntityReference->__construct() - construct a new DOMEntityReference object

DOMException

DOM operations raise exceptions under particular circumstances, i.e., when an operation is impossible to perform for logical reasons.

属性

表 7.

Name	Type	Read-only	Description
code	int	yes	An integer indicating the type of error generated

DOMImplementation

The DOMImplementation interface provides a number of methods for performing operations that are independent of any particular instance of the document object model.

构造函数

DOMImplementation->__construct() - construct a new DOMImplementation object

方法

DOMImplementation->createDocument() - Creates a DOM Document object of the specified type with its document element
DOMImplementation->createDocumentType() - Creates an empty DOMDocumentType object
DOMImplementation->hasFeature() - Test if the DOM implementation implements a specific feature

DOMNamedNodeMap

方法

DOMNamedNodeMap->getNamedItem() - Retrieves a node specified by name
DOMNamedNodeMap->getNamedItemNS() - Retrieves a node specified by local name and namespace URI
DOMNamedNodeMap->item() - Retrieves a node specified by index

DOMNode

方法

DOMNode->appendChild() - Adds new child at the end of the children
DOMNode->cloneNode() - Clones a node
DOMNode->hasAttributes() - Checks if node has attributes
DOMNode->hasChildNodes() - Checks if node has children
DOMNode->insertBefore() - Adds a new child before a reference node
DOMNode->isDefaultNamespace() - Checks if the specified namespaceURI is the default namespace
DOMNode->isSameNode() - Indicates if two nodes are the same node
DOMNode->isSupported() - Checks if feature is supported for specified version
DOMNode->lookupNamespaceURI() - Returns namespace URI of the node based on the prefix
DOMNode->lookupPrefix() - Returns name space prefix of the node based on namespaceURI
DOMNode->normalize() - Normalizes the node
DOMNode->removeChild() - Removes child from list of children
DOMNode->replaceChild() - Replaces a child

属性

表 8.

Name	Type	Read-only	Description
nodeName	string	yes	Returns the most accurate name for the current node type
nodeValue	string	no	The value of this node, depending on its type.
nodeType	int	yes	Gets the type of the node. One of the predefined XML_xxx_NODE constants
parentNode	DOMNode	yes	The parent of this node.
childNodes	DOMNodeList	yes	A DOMNodeList that contains all children of this node. If there are no children, this is an empty DOMNodeList.
firstChild	DOMNode	yes	The first child of this node. If there is no such node, this returns `NULL`.
lastChild	DOMNode	yes	The last child of this node. If there is no such node, this returns `NULL`.
previousSibling	DOMNode	yes	The node immediately preceding this node. If there is no such node, this returns `NULL`.
nextSibling	DOMNode	yes	The node immediately following this node. If there is no such node, this returns `NULL`.
attributes	DOMNamedNodeMap	yes	A DOMNamedNodeMap containing the attributes of this node (if it is a DOMElement) or `NULL` otherwise.
ownerDocument	DOMDocument	yes	The DOMDocument object associated with this node.
namespaceURI	string	yes	The namespace URI of this node, or `NULL` if it is unspecified.
prefix	string	no	The namespace prefix of this node, or `NULL` if it is unspecified.
localName	string	yes	Returns the local part of the qualified name of this node.
baseURI	string	yes	The absolute base URI of this node or `NULL` if the implementation wasn't able to obtain an absolute URI.
textContent	string	no	This attribute returns the text content of this node and its descendants.

DOMNodeList

方法

DOMNodelist->item() - Retrieves a node specified by index

属性

表 9.

Name	Type	Read-only	Description
length	int	yes	The number of nodes in the list. The range of valid child node indices is 0 to `length - 1` inclusive.

DOMNotation

Extends DOMNode

属性

表 10.

Name	Type	Read-only	Description
publicId	string	yes
systemId	string	yes

DOMProcessingInstruction

Extends DOMNode.

构造函数

DOMProcessingInstruction->__construct() - construct a new DOMProcessingInstruction object

属性

表 11.

Name	Type	Read-only	Description
target	string	yes
data	string	no

DOMText

Extends DOMCharacterData.

构造函数

DOMText->__construct() - construct a new DOMText object

方法

DOMText->isWhitespaceInElementContent() - Indicates whether this text node contains whitespace
DOMText->splitText() - Breaks the node into two nodes at the specified offset

属性

表 12.

Name	Type	Read-only	Description
wholeText	string	yes

DOMXPath

构造函数

DOMXPath->__construct() - construct a new DOMXPath object

方法

DOMXPath->registerNamespace() - Registers the namespace with the DOMXpath object
DOMXPath->evaluate() - Evaluates the given XPath expression and returns a typed result if possible
DOMXPath->query() - Evaluates the given XPath expression

属性

表 13.

Name	Type	Read-only	Description
document	DOMDocument

范例

Many examples in this reference require an XML file. We will use book.xml that contains the following:

例 1. book.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
]>
<book id="listing">
 <title>My lists</title>
 <chapter id="books">
  <title>My books</title>
  <para>
   <informaltable>
    <tgroup cols="4">
     <thead>
      <row>
       <entry>Title</entry>
       <entry>Author</entry>
       <entry>Language</entry>
       <entry>ISBN</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>The Grapes of Wrath</entry>
       <entry>John Steinbeck</entry>
       <entry>en</entry>
       <entry>0140186409</entry>
      </row>
      <row>
       <entry>The Pearl</entry>
       <entry>John Steinbeck</entry>
       <entry>en</entry>
       <entry>014017737X</entry>
      </row>
      <row>
       <entry>Samarcande</entry>
       <entry>Amine Maalouf</entry>
       <entry>fr</entry>
       <entry>2253051209</entry>
      </row>
      <!-- TODO: I have a lot of remaining books to add.. -->
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </chapter>
</book>

预定义常量

以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。

表 14. XML constants

Constant	Value	Description
`XML_ELEMENT_NODE` (integer)	1	Node is a DOMElement
`XML_ATTRIBUTE_NODE` (integer)	2	Node is a DOMAttr
`XML_TEXT_NODE` (integer)	3	Node is a DOMText
`XML_CDATA_SECTION_NODE` (integer)	4	Node is a DOMCharacterData
`XML_ENTITY_REF_NODE` (integer)	5	Node is a DOMEntityReference
`XML_ENTITY_NODE` (integer)	6	Node is a DOMEntity
`XML_PI_NODE` (integer)	7	Node is a DOMProcessingInstruction
`XML_COMMENT_NODE` (integer)	8	Node is a DOMComment
`XML_DOCUMENT_NODE` (integer)	9	Node is a DOMDocument
`XML_DOCUMENT_TYPE_NODE` (integer)	10	Node is a DOMDocumentType
`XML_DOCUMENT_FRAG_NODE` (integer)	11	Node is a DOMDocumentFragment
`XML_NOTATION_NODE` (integer)	12	Node is a DOMNotation
`XML_HTML_DOCUMENT_NODE` (integer)	13
`XML_DTD_NODE` (integer)	14
`XML_ELEMENT_DECL_NODE` (integer)	15
`XML_ATTRIBUTE_DECL_NODE` (integer)	16
`XML_ENTITY_DECL_NODE` (integer)	17
`XML_NAMESPACE_DECL_NODE` (integer)	18
`XML_ATTRIBUTE_CDATA` (integer)	1
`XML_ATTRIBUTE_ID` (integer)	2
`XML_ATTRIBUTE_IDREF` (integer)	3
`XML_ATTRIBUTE_IDREFS` (integer)	4
`XML_ATTRIBUTE_ENTITY` (integer)	5
`XML_ATTRIBUTE_NMTOKEN` (integer)	7
`XML_ATTRIBUTE_NMTOKENS` (integer)	8
`XML_ATTRIBUTE_ENUMERATION` (integer)	9
`XML_ATTRIBUTE_NOTATION` (integer)	10

表 15. DOMException constants

Constant	Value	Description
`DOM_INDEX_SIZE_ERR` (integer)	1	If index or size is negative, or greater than the allowed value.
`DOMSTRING_SIZE_ERR` (integer)	2	If the specified range of text does not fit into a DOMString.
`DOM_HIERARCHY_REQUEST_ERR` (integer)	3	If any node is inserted somewhere it doesn't belong
`DOM_WRONG_DOCUMENT_ERR` (integer)	4	If a node is used in a different document than the one that created it.
`DOM_INVALID_CHARACTER_ERR` (integer)	5	If an invalid or illegal character is specified, such as in a name.
`DOM_NO_DATA_ALLOWED_ERR` (integer)	6	If data is specified for a node which does not support data.
`DOM_NO_MODIFICATION_ALLOWED_ERR` (integer)	7	If an attempt is made to modify an object where modifications are not allowed.
`DOM_NOT_FOUND_ERR` (integer)	8	If an attempt is made to reference a node in a context where it does not exist.
`DOM_NOT_SUPPORTED_ERR` (integer)	9	If the implementation does not support the requested type of object or operation.
`DOM_INUSE_ATTRIBUTE_ERR` (integer)	10	If an attempt is made to add an attribute that is already in use elsewhere.
`DOM_INVALID_STATE_ERR` (integer)	11	If an attempt is made to use an object that is not, or is no longer, usable.
`DOM_SYNTAX_ERR` (integer)	12	If an invalid or illegal string is specified.
`DOM_INVALID_MODIFICATION_ERR` (integer)	13	If an attempt is made to modify the type of the underlying object.
`DOM_NAMESPACE_ERR` (integer)	14	If an attempt is made to create or change an object in a way which is incorrect with regard to namespaces.
`DOM_INVALID_ACCESS_ERR` (integer)	15	If a parameter or an operation is not supported by the underlying object.
`DOM_VALIDATION_ERR` (integer)	16	If a call to a method such as insertBefore or removeChild would make the Node invalid with respect to "partial validity", this exception would be raised and the operation would not be done.

目录
DOMAttr->__construct() -- Creates a new DOMAttr object
DOMAttr->isId() -- Checks if attribute is a defined ID
DOMCharacterData->appendData() -- Append the string to the end of the character data of the node
DOMCharacterData->deleteData() -- Remove a range of characters from the node
DOMCharacterData->insertData() -- Insert a string at the specified 16-bit unit offset
DOMCharacterData->replaceData() -- Replace a substring within the DOMCharacterData node
DOMCharacterData->substringData() -- Extracts a range of data from the node
DOMComment->__construct() -- Creates a new DOMComment object
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 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
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
DOMDocumentFragment->appendXML() -- Append raw XML data
DOMElement->__construct() -- Creates a new DOMElement object
DOMElement->getAttribute() -- Returns value of attribute
DOMElement->getAttributeNode() -- Returns attribute node
DOMElement->getAttributeNodeNS() -- Returns attribute node
DOMElement->getAttributeNS() -- Returns value of attribute
DOMElement->getElementsByTagName() -- Gets elements by tagname
DOMElement->getElementsByTagNameNS() -- Get elements by namespaceURI and localName
DOMElement->hasAttribute() -- Checks to see if attribute exists
DOMElement->hasAttributeNS() -- Checks to see if attribute exists
DOMElement->removeAttribute() -- Removes attribute
DOMElement->removeAttributeNode() -- Removes attribute
DOMElement->removeAttributeNS() -- Removes attribute
DOMElement->setAttribute() -- Adds new attribute
DOMElement->setAttributeNode() -- Adds new attribute node to element
DOMElement->setAttributeNodeNS() -- Adds new attribute node to element
DOMElement->setAttributeNS() -- Adds new attribute
DOMElement->setIdAttribute() -- Declares the attribute specified by name to be of type ID
DOMElement->setIdAttributeNode() -- Declares the attribute specified by node to be of type ID
DOMElement->setIdAttributeNS() -- Declares the attribute specified by local name and namespace URI to be of type ID
DOMEntityReference->__construct() -- Creates a new DOMEntityReference object
DOMImplementation->__construct() -- Creates a new DOMImplementation object
DOMImplementation->createDocument() -- Creates a DOMDocument object of the specified type with its document element
DOMImplementation->createDocumentType() -- Creates an empty DOMDocumentType object
DOMImplementation->hasFeature() -- Test if the DOM implementation implements a specific feature
DOMNamedNodeMap->getNamedItem() -- Retrieves a node specified by name
DOMNamedNodeMap->getNamedItemNS() -- Retrieves a node specified by local name and namespace URI
DOMNamedNodeMap->item() -- Retrieves a node specified by index
DOMNode->appendChild() -- Adds new child at the end of the children
DOMNode->cloneNode() -- Clones a node
DOMNode->hasAttributes() -- Checks if node has attributes
DOMNode->hasChildNodes() -- Checks if node has children
DOMNode->insertBefore() -- Adds a new child before a reference node
DOMNode->isDefaultNamespace() -- Checks if the specified namespaceURI is the default namespace or not
DOMNode->isSameNode() -- Indicates if two nodes are the same node
DOMNode->isSupported() -- Checks if feature is supported for specified version
DOMNode->lookupNamespaceURI() -- Gets the namespace URI of the node based on the prefix
DOMNode->lookupPrefix() -- Gets the namespace prefix of the node based on the namespace URI
DOMNode->normalize() -- Normalizes the node
DOMNode->removeChild() -- Removes child from list of children
DOMNode->replaceChild() -- Replaces a child
DOMNodelist->item() -- Retrieves a node specified by index
DOMProcessingInstruction->__construct() -- Creates a new DOMProcessingInstruction object
DOMText->__construct() -- Creates a new DOMText object
DOMText->isWhitespaceInElementContent() -- Indicates whether this text node contains whitespace
DOMText->splitText() -- Breaks this node into two nodes at the specified offset
DOMXPath->__construct() -- Creates a new DOMXPath object
DOMXPath->evaluate() -- Evaluates the given XPath expression and returns a typed result if possible.
DOMXPath->query() -- Evaluates the given XPath expression
DOMXPath->registerNamespace() -- Registers the namespace with the DOMXPath object
dom_import_simplexml -- Gets a DOMElement object from a SimpleXMLElement object

add a note User Contributed Notes

Francois Hill
01-Aug-2007 06:21


In response to lutfi at smartconsultant dot us :



(see my post on

http://fr2.php.net/manual/en/

function.dom-domdocument-getelementsbytagname.php

)



Use this class I wrote:



class XPathableNode extends DOMNode

{

    protected $Node;

    protected $DOMDocument_from_node;

    protected $DOMXpath_for_node;



    public function __construct(/* DOMNode */ $node)

    {

        $this->Node=$node;

        $this->DOMDocument_from_node=new 

                                                          DomDocument();

        $domNode=$this->DOMDocument_from_node

                                  ->importNode($this->Node, true);

        $this->DOMDocument_from_node

                                 ->appendChild($domNode);

        $this->DomXpath_for_node = 

                    new Domxpath($this->

                                         DOMDocument_from_node);

    }



    public function convertHTML()

    {    return $this->DOMDocument_from_node

                                                             ->saveHTML();

    }



    public /*DomNodeList*/ function applyXpath($xpath)

    {    return $this->DomXpath_for_node

                                                       ->query($xpath);

    }

}



(sorry for the display... What a terrible hinderance on the

part of php.net !)



Then :

Make a new XPathableNode out of your parent node.

You may then retrieve a DOMNodeList from it by applying a

xpath (thus being able to specify the depth  and name of 

elements you want).



Has got me around some (of the many) DOM awkwardnesses a few times.



;o)

lpetrov AT axisvista.com
21-Jul-2007 12:41


Basicly there are alot of problems on dynamic namespaces registering and other maybe 'not well' documented parts of DOM.



Here is an article covering some of the problems that our company web developers found while we were developing a template engine for our new framework.



The link:

http://blog.axisvista.com/?p=35

lutfi at smartconsultant dot us
20-Jul-2007 04:06


i have some problem parsing recurred xml tree here:



<menu name='parent1' >

  <submenu name='file' >

     <submenu name='open' >Open file</submenu>

     <submenu name='close' >Close file</submenu>

  </submenu>

  <submenu name='edit' >

     <submenu name='cut' >Cut Clipboards</submenu>

     <submenu name='copy' >Copy Clipboards</submenu>

     <submenu name='paste' >Paste Clipboards</submenu>

  </submenu>

</menu>



with getElementsByTagName all submenu is on the same level.

i want it to be structured like tree list, but not change the 'submenu' tag

Sanados at failure dot at
05-Jun-2007 09:45


appended to 

brian dot reynolds at risaris dot com

20-Feb-2007 10:09



when you got variable nodes at start you array fails and looses nodes  beneath.

solution that counts occurance though eats up performance:



function xmlToArray($n)

{

    $xml_array = array();

    $occurance = array();



     foreach($n->childNodes as $nc)

     {

         $occurance[$nc->nodeName]++;

     }

     

    foreach($n->childNodes as $nc){

        if( $nc->hasChildNodes() )

        {

            if($occurance[$nc->nodeName] > 1)

            {

                $xml_array[$nc->nodeName][] = xmlToArray($nc);

            }

            else

            {

                $xml_array[$nc->nodeName] = xmlToArray($nc);

            }

        }

        else

        {

            return utf8_decode($nc->nodeValue);

        }

    }

    return $xml_array;

}

Yanik <clonyara(at)ahoo(dot)com>
14-Mar-2007 07:40


I hate DOM model !

so I wrote dom2array simple function (simple for use):



function dom2array($node) {

  $res = array();

  print $node->nodeType.'<br/>';

  if($node->nodeType == XML_TEXT_NODE){

      $res = $node->nodeValue;

  }

  else{

      if($node->hasAttributes()){

          $attributes = $node->attributes;

          if(!is_null($attributes)){

              $res['@attributes'] = array();

              foreach ($attributes as $index=>$attr) {

                  $res['@attributes'][$attr->name] = $attr->value;

              }

          }

      }

      if($node->hasChildNodes()){

          $children = $node->childNodes;

          for($i=0;$i<$children->length;$i++){

              $child = $children->item($i);

              $res[$child->nodeName] = dom2array($child);

          }

      }

  }

  return $res;

}

Nevyn at N dot O dot S dot P dot A dot M dot emai dot it
10-Mar-2007 03:35


I wrote a couple of functions to:

 - create a DOMDocument from a file

 - parse the namespaces in it

 - create a XPath object with all the namespaces registered

 - load the schemalocations

 - validate the file on the main schema (the one without prefix)



It is useful for me, see if it is also for someone else!!



Giulio



function decodeNode($node)

{

    $out = $node->ownerDocument->saveXML($node);

    $re = "{^<((?:\\w*:)?\\w*)". //the tag name

    "[\\s\n\r]*((?:[\\s\n\r]*". 

    "(?:\\w*:)?\\w+[\\s\n\r]*=[\\s\n\r]*". //possible attribute name

    "(?:\"[^\"]*\"|\'[^\']*\'))*)". //attribute value

    "[\\s\n\r]*>[\r\n]*".

    "((?:.*[\r\n]*)*)". //content

    "[\r\n]*</\\1>$}"; //closing tag

    preg_match($re, $out, $mat);

    return $mat;

}



function innerXml($node)

{

    $mat = decodeNode($node);

    return $mat[3];

}



function getnodeAttributes($node)

{

    $mat = decodeNode($node);

    $txt = $mat[2];

    $re = "{((?:\\w*:)?\\w+)[\\s\n\r]*=[\\s\n\r]*(\"[^\"]*\"|\'[^\']*\')}";

    preg_match_all($re, $txt, $mat);

    $att = array();

    for ($i=0; $i<count($mat[0]); $i++)

    {

        $value = $mat[2][$i];

        if ($value[0] == "\'" || $value[0] == "\"")

        {

            $len = strlen($value);

            $value = substr($value, 1, strlen($value)-2);

        }

        $att[ $mat[1][$i] ] = $value;

    }

    return $att;

}



function loadXml($file)

{

    $doc = new DOMDocument();

    $doc->load($file);

    //cerca l'attributo xmlns

    $xsi = false;

    $doc->namespaces = array();

    $doc->xpath = new DOMXPath($doc);

    

    $attr = getnodeAttributes($doc->documentElement);

    foreach ($attr as $name => $value)

    {

        if (substr($name,0,5) == "xmlns")

        {

            $uri = $value;

            $pre = $doc->documentElement->lookupPrefix($uri);

            if ($uri == "http://www.w3.org/2001/XMLSchema-instance")

                $xsi = $pre;

            $doc->namespaces[$pre] = $uri;

            if ($pre == "")

                $pre = "noname";

            $doc->xpath->registerNamespace($pre, $uri);

        }

    }

    

    if ($xsi)

    {

        $doc->schemaLocations = array();

        $lst = $doc->xpath->query("//@$xsi:schemaLocation");

        foreach($lst as $el)

        {

            $re = "{[\\s\n\r]*([^\\s\n\r]+)[\\s\n\r]*([^\\s\n\r]+)}";

            preg_match_all($re, $el->nodeValue, $mat);

            for ($i=0; $i<count($mat[0]); $i++)

            {

                $value = $mat[2][$i];

                $doc->schemaLocations[ $mat[1][$i] ] = $value;

            }

        }



        $olddir = getcwd();

        chdir(dirname($file));

        $schema = $doc->schemaLocations[$doc->namespaces[""]];

        if (substr($schema,0,7) == "file://")

        {

            $schema = substr($value,7);

        }

        if (!$doc->schemaValidate($schema))

            dbg()->err("Invalid file");

        chdir($olddir);

    }

    

    return $doc;

}

brian dot reynolds at risaris dot com
20-Feb-2007 09:09


I found the xml2array function below very useful, but there seems to be a bug in it. The $item variable was never getting set. I've expanded this out to be a bit more readable, and the corrected code is : 



function xmlToArray($n)

{

    $return=array();



    foreach($n->childNodes as $nc){

        if( $nc->hasChildNodes() ){

            if( $n->firstChild->nodeName== $n->lastChild->nodeName&&$n->childNodes->length>1){

                $item = $n->firstChild;

                $return[$nc->nodeName][]=$this->xmlToArray($item);

            }

            else{

                 $return[$nc->nodeName]=$this->xmlToArray($nc);

            }

       }

       else{

           $return=$nc->nodeValue;

       } 

    }

    return $return;

}

cooper at asu dot ntu-kpi dot kiev dot ua
22-Nov-2006 10:32


If you are using not object-oriented functions and it takes too much time to change them all (or you'll be replacing them later) then as a temporary decision can be used this modules:



For DOM XML:

http://alexandre.alapetite.net/doc-alex/domxml-php4-php5/



For XSLT:

http://alexandre.alapetite.net/doc-alex/xslt-php4-php5/

cormac at idreamproducts dot com
17-Oct-2006 10:48


Most email clients ignore stylesheets in HTML formatted emails.  The best way to ensure your HTML is formatted correctly by a broad spectrum of email clients, including webmail implementations as Gmail, is to use inline style attributes.  The following function uses DOM to parse an inline stylesheet, and will replace element class and id attributes with inline style attributes, and add inline style attributes for generic tag stylesheet rules.  It will remove the stylesheet and any used class and id attributes as these are defunct for most email clients.  It is a fairly lightweight function and does not support CSS inheritance, but will work for simple stylesheets e.g.:



<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

"http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>HTML EMAIL</title>

<style type="text/css">

body {

  margin: 10px 10px;

  font: 8pt arial;

  background: #fff;

  color: #000;

}

p {

  margin: 0 0 10px;

  line-height: 1.2em;

  text-align: justify;

}

p.centered {

  text-align: centre;

}

p#right {

  text-align: right;

}

</style>

</head>

<body>

<p>Sample text justified</p>

<p class="centered">Centered text here</p>

<p id="right">Right-aligned text</p>

</body>

</html>



Here's the function:



<?php

function parseStyleSheetfor Email($html)

{

  $doc = new DOMDocument;

  $doc->loadHTML($html);

  // grab inline stylesheet as DOM object

  $oStyle = $doc->getElementsByTagName('style')->item(0);

  // grab rule identifiers and rules

  preg_match_all('/^([-#._a-z0-9]+) ?\{(.*?)\}/ims', $oStyle->nodeValue, $aMatches, PREG_SET_ORDER);

  foreach ($aMatches as $aRule) {

    $rule_id = $aRule[1];

    // clean up rules

    $rule = str_replace(array("\r", "\n", '  ', '; '), array('', '', ' ', ';'), $aRule[2]);

    $rule = preg_replace(array('/^ /', '/;$/'), '', $rule);

    // generic rules

    if (!strstr($rule_id, '.') && !strstr($rule_id, '#')) {

      $items = $doc->getElementsByTagName($rule_id);

      // set style attribute equal to rule from stylesheet

      foreach ($items as $item) {

        // if there is already inline style append it to end of stylesheet rule

        $current_style = $item->getAttribute('style');

        if (!empty($current_style)) {

          $item->setAttribute('style', $rule . ';' . $current_style);

        } else {

          $item->setAttribute('style', $rule);

        }

      }

    // classes

    } elseif (strstr($rule_id, '.')) {

      list($rule_tag, $rule_class) = explode('.', $rule_id);

      $items = $doc->getElementsByTagName($rule_tag);

      foreach ($items as $item) {

        $class = $item->getAttribute('class');

        if ($class == $rule_class) {

          // if there is already inline style append it to end of stylesheet rule

          $current_style = $item->getAttribute('style');

          if (!empty($current_style)) {

            $item->setAttribute('style', $current_style . ';' . $rule);

          } else {

            $item->setAttribute('style', $rule);

          }

          // remove class as it won't be used now

          $item->removeAttribute('class');

        }

      }

    // ids

    } elseif (strstr($rule_id, '#')) {

      list($rule_tag, $id) = explode('#', $rule_id);

      $item = $doc->getElementById($id);

      $current_style = $item->getAttribute('style');

      if (!empty($current_style)) {

        $item->setAttribute('style', $current_style . ';' . $rule);

      } else {

        $item->setAttribute('style', $rule);

      }

      // remove class as it won't be used now

      $item->removeAttribute('id');

    }

  }

  // remove inline stylesheet

  $oStyle->parentNode->removeChild($oStyle);

  return $doc->saveHTML();

}

?>

sean at lookin3d dot com
17-Aug-2006 05:21


$xmlDoc=<<<XML

<?xml version="1.0"?>

<methodCall>

   <methodName>examples.getStateName</methodName>

   <params>

      <param>

         <value><i4>41</i4></value>

         </param>

      </params>

   </methodCall>

XML;



$xml= new DOMDocument();

$xml->preserveWhiteSpace=false;

$xml->loadXML($xmlDoc);

print_r(xml2array($xml));



function xml2array($n)

{

    $return=array();

    foreach($n->childNodes as $nc)

    ($nc->hasChildNodes())

    ?($n->firstChild->nodeName== $n->lastChild->nodeName&&$n->childNodes->length>1)

    ?$return[$nc->nodeName][]=xml2array($item)

    :$return[$nc->nodeName]=xml2array($nc)

    :$return=$nc->nodeValue;

    return $return;

}

massimo dot scamarcia at gmail dot com
20-Feb-2006 10:56


If you're moving from PHP4 to PHP5, you can keep your scripts untouched using this:



http://alexandre.alapetite.net/doc-alex/domxml-php4-php5/index.en.html

simlee at indiana dot edu
29-Dec-2005 08:16


The project I'm currently working on uses XPaths to dynamically navigate through chunks of an XML file.  I couldn't find any PHP code on the net that would build the XPath to a node for me, so I wrote my own function.  Turns out it wasn't as hard as I thought it might be (yay recursion), though it does entail using some PHP shenanigans...  



Hopefully it'll save someone else the trouble of reinventing this wheel. 



<?php

    function getNodeXPath( $node ) {

        // REMEMBER THAT XPATHS USE BASE-1 INSTEAD OF BASE-0!!!

        

        // Get the index for the current node by looping through the siblings.

        $parentNode = $node->parentNode;

        if( $parentNode != null ) {

            $nodeIndex = 0;

            do {

                $testNode = $parentNode->childNodes->item( $nodeIndex );

                $nodeName = $testNode->nodeName;

                $nodeIndex++;

                

                // PHP trickery!  Here we create a counter based on the node 

                //  name of the test node to use in the XPath.

                if( !isset( $$nodeName ) ) $$nodeName = 1;

                else $$nodeName++;

                

                // Failsafe return value.

                if( $nodeIndex > $parentNode->childNodes->length ) return( "/" );

            } while( !$node->isSameNode( $testNode ) );

            

            // Recursively get the XPath for the parent.

            return( getNodeXPath( $parentNode ) . "/{$node->nodeName}[{$$nodeName}]" );

        } else {

            // Hit the root node!  Note that the slash is added when 

            //  building the XPath, so we return just an empty string.

            return( "" );

        }

    }

?>

johanwthijs-at-hotmail-dot-com
14-Dec-2005 02:25


Being an experienced ASP developer I was wondering how to replace textual content of a node (with msxml this is simply acheived by setting the 'text' property of a node). Out of frustration I started to play around with SimpleXml but I could not get it to work in combination with xPath.



I took me a lot of time to find out so I hope this helps others:



function replaceNodeText($objXml, $objNode, $strNewContent){

    /*

    This function replaces a node's string content with strNewContent

    */

    $objNodeListNested = &$objNode->childNodes;

    foreach ( $objNodeListNested as $objNodeNested ){

         if ($objNodeNested->nodeType == XML_TEXT_NODE)$objNode->removeChild ($objNodeNested);

    }

    

    $objNode->appendChild($objXml->createTextNode($strNewContent));

}



$objXml= new DOMDocument();

$objXml->loadXML('<root><node id="1">bla</note></root>');

$objXpath = new domxpath($objXml);



$strXpath="/root/node[@id='1']";

$objNodeList = $objXpath ->query($strXpath);

foreach ($objNodeList as $objNode){

//pass the node by reference

replaceNodeText($objXml, &$objNode, $strImportedValue);

}

mark at vectrex dot org dot uk
17-Nov-2005 10:10


Note that these DOM functions expect (and presumably return) all their data in UTF-8 character encoding, regardless of what PHP's current encoding is. This means that text nodes, attribute values etc, should be in utf8.



This applies even if you're generating an XML document which is not ultimately in utf8.



Mark

toby at tobiasly dot com
22-Oct-2005 06:08


This module is not included by default either in the CentOS 4 "centosplus" repository. For those using PHP5 on CentOS 4, a simple "yum --enablerepo=centosplus install php-xml" will do the trick (this will install both the XML and DOM modules).

pes_cz
29-Sep-2005 07:32


When I tried to parse my XHTML Strict files with DOM extension, it couldn't understand xhtml entities (like &copy;). I found post about it here (14-Jul-2005 09:05) which adviced to add resolveExternals = true, but it was very slow. There was some small note about xml catalogs but without any glue. Here it is:



XML catalogs is something like cache. Download all needed dtd's to /etc/xml, edit file /etc/xml/catalog and add this line: <public publicId="-//W3C//DTD XHTML 1.0 Strict//EN" uri="file:///etc/xml/xhtml1-strict.dtd" />



Thats all. Thanks to http://www.whump.com/moreLikeThis/link/03815

amir.laherATcomplinet.com
22-Aug-2005 12:09


This particular W3C page provides invaluable documentation for the DOM classes implemented in php5 (via libxml2). It fills in plenty of php.net's gaps:



http://www.w3.org/TR/DOM-Level-2-Core/core.html



Some key examples:

* concise summary of the class heirachy (1.1.1)

* clarification that DOM level 2 doesn't allow for population of internal DTDs

* explanation of DOMNode->normalize()

* explanation of the DOMImplementation class



The interfaces are described in OMG's Interface Definition Language

aidan at php dot net
19-Jul-2005 01:04


As of PHP 5.1, libxml options may be set using constants rather than the use of proprietary DomDocument properties.



DomDocument->resolveExternals is equivilant to setting

LIBXML_DTDLOAD

LIBXML_DTDATTR



DomDocument->validateOnParse is equivilant to setting

LIBXML_DTDLOAD

LIBXML_DTDVALID



PHP 5.1 users are encouraged to use the new constants. 



Example:



DomDocument->load($file, LIBXML_DTDLOAD|LIBXML_DTDATTR);



DomDocument->load($file, LIBXML_DTDLOAD|LIBXML_DTDVALID);

aidan at php dot net
19-Jul-2005 03:27


When dealing with validation or loading, the output errors can be quite annoying.



PHP 5.1 introduces libxml_get_errors().



http://php.net/libxml_get_errors

php at webdevelopers dot cz
14-Jul-2005 07:05


[Editor's Note: If you're using entities, then you have no choice. XML Catalogs can speed DTD resolution.]





Never use 





$dom->resolveExternals=true;





when parsing XHTML document that has the DOCTYPE declaration with DTD URL specified in it.





Otherwise parsing the XHTML with DOCTYPE like this one:





<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">





will result in PHP/DOM downloading the DTD file from W3C site when parsing your document. It will add extra delay to your script - I experienced that $dom->load()'s total time was from 1 to 16 seconds.





elixon

spammable69 at hotmail dot com
12-Apr-2005 05:18


I wrote a framework to implement the StyleSheet interfaces as specified on the W3C website.  The code is written in PHP, and is NOT a complete implementation.  Use it how ya like.  I was planning on adding the CSSStyleSheet interfaces as well.  Feel free to ask.



<?

    class StyleSheetList {

        public length;

        private self;

        

        function __construct ( ) {

            $this->self = array();

        }

        

        function __get($property, $&ret) {

            if($property == 'length')

                $ret = count($this->self);

            return true;

        }

        

        function __set($property, $val) {

            if($property == 'length')

                return true;

        }

        

        function item( $index ) {

            return $this->self[$index];

        }

    }

    

    class MediaList extends StyleSheetList {

        

        function appendMedium ( $newMedium ) {

            array_push($this->self, $newMedium);

        }

        

        function deleteMedium ( $oldMedium ) {

            foreach($this->self as $item) {

                if( $item == $oldMedium ) {

                    $item = $this->self[ $this->length-1 ];

                    array_pop($this->self);

                    break;

                }

            }

        }

    }

    

    class DocumentStyle {

        public styleSheets;

        

        function __construct ( ) {

            $this->styleSheets = new StyleSheetList();

        }

        

        function __set($property, $val) {

            if($property == 'styleSheets')

                return true;

        }

    }

    

    class LinkStyle {

        public sheet;

        

        function __construct () {

            $this->sheet = new StyleSheet();

        }

        

        function __set($property, $val) {

            if($property == 'sheet')

                return true;

        }

    }

    

    class StyleSheet {

        public type;

        public disabled;

        public ownerNode;

        public parentStyleSheet;

        public href;

        public title;

        public media;

        

        function __construct( $type, $disabled, $ownerNode, $parentStyleSheet, $href, $title){

            $this->type = $type;

            $this->disabled = $disabled;

            $this->media = new MediaList();

            $this->ownerNode = $ownerNode;

            $this->parentStyleSheet = $parentStyleSheet;

            $this->href = $href;

            $this->title = $title;

        }

    }

?>



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