As japos mentioned. Take care how you use isEmptyElement. After you are done looping through the attributes: isEmptyElement will be false. You can use moveToElement() to move the cursor back to the element and then you can use isEmptyElement like normal again.
La clase XMLReader
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
Introducción
La extensión XMLReader es un analizador de XML. El lector actúa como un cursor yendo hacia adelante en la corriente del documento y deteniéndose en cada nodo del camino.
Sinopsis de la Clase
class XMLReader
{
/* Constantes */
/* Propiedades */
/* Métodos */
}Propiedades
- attributeCount
-
El número de atributos en el nodo
- baseURI
-
La base URI del nodo
- depth
-
La profundidad del nodo en el árbol, empezando en 0
- hasAttributes
-
Indica si el nodo tiene atributos
- hasValue
-
Indica si el nodo tiene un valor de texto
- isDefault
-
Indica si el atributo está por defecto del DTD
- isEmptyElement
-
Indica si el nodo es un elemento vacio de etiqueta
- localName
-
El nombre local del nodo
- name
-
El nombre calificado del nodo
- namespaceURI
-
El URI del namespace asociado con el nodo
- nodeType
-
El tipo de nodo para el nodo
- prefix
-
El prefijo del namespace asociado con el nodo
- value
-
El valor de texto del nodo
- xmlLang
-
El xml: El lang scope el cual el nodo reside
Constantes predefinidas
XMLReader Node Types
XMLReader::NONE-
Sin tipo de nodo
XMLReader::ELEMENT-
Empieza el eleménto
XMLReader::ATTRIBUTE-
El atributo del nodo
XMLReader::TEXT-
El nodo de texto
XMLReader::CDATA-
El CDATA del nodo
XMLReader::ENTITY_REF-
La entidad de refencia del nodo
XMLReader::ENTITY-
La entidad de declaración del nodo
XMLReader::PI-
La instrucción de proceso del nodo
XMLReader::COMMENT-
El comentario del nodo
XMLReader::DOC-
El documento del nodo
XMLReader::DOC_TYPE-
El tipo de documento del nodo
XMLReader::DOC_FRAGMENT-
El fragmento del documento del nodo
XMLReader::NOTATION-
La notación del nodo
XMLReader::WHITESPACE-
El espacio en blanco del nodo
XMLReader::SIGNIFICANT_WHITESPACE-
El espacio en blanco significante del nodo
XMLReader::END_ELEMENT-
El fin del eleménto
XMLReader::END_ENTITY-
La entidad final
XMLReader::XML_DECLARATION-
La declaración XML del nodo
XMLReader Parser Options
XMLReader::LOADDTD-
Carga el DTD pero no lo valida
XMLReader::DEFAULTATTRS-
Carga el DTD y los atributos por defecto pero no los valida
XMLReader::VALIDATE-
Carga el DTD y valida el analizado en blanco
XMLReader::SUBST_ENTITIES-
Substituye las entidades y expande las referencias
Tabla de contenidos
- XMLReader::close — Cierra la entrada del XMLReader
- XMLReader::expand — Devuelve una copia del actual nodo como un objeto DOM
- XMLReader::getAttribute — Obtiener el valor del atributo nombrado
- XMLReader::getAttributeNo — Obtiene el valor de un atributo por el indice
- XMLReader::getAttributeNs — Obtiene el valor de un atributo por su nombre local y URI
- XMLReader::getParserProperty — Indica si la porpiedad especificada ha sido establecida
- XMLReader::isValid — Indica si el documento analizado es válido
- XMLReader::lookupNamespace — Busca el namespace para un prefijo
- XMLReader::moveToAttribute — Mueve el cursor a un atributo nombrado
- XMLReader::moveToAttributeNo — Mueve el cursor a un atributo por su índice
- XMLReader::moveToAttributeNs — Mover el cursor a un atributo dado
- XMLReader::moveToElement — Posiciona el cursor en el eleménto padre del actual atributo
- XMLReader::moveToFirstAttribute — Posiciona el cursor en el primer atributo
- XMLReader::moveToNextAttribute — Posiciona el cursor en el siguiente atributo
- XMLReader::next — Mueve el cursor al siguiente nodo saltandose todos los subárboles
- XMLReader::open — Establece el URI conteniendo el XML a analizar
- XMLReader::read — Se mueve al siguiente nodo en el documento
- XMLReader::readInnerXml — Recupera el XML del actual nodo
- XMLReader::readOuterXml — Recupera el XML del actual nodo, incluyendo él mismo
- XMLReader::readString — Lee el contenido del nodo actual como string
- XMLReader::setParserProperty — Establecer las opciones del analizador
- XMLReader::setRelaxNGSchema — Establece el nomb re del archivo o el URI para un esquema RelaxNG
- XMLReader::setRelaxNGSchemaSource — Establece los datos contenidos en un esquema RelaxNG
- XMLReader::setSchema — Valida el documento en contra del XSD
- XMLReader::XML — Establece el contenido del XML a analizar
add a note
User Contributed Notes 20 notes
Sean Colin Ruiz ¶
7 years ago
james dot ellis at example dot com ¶
15 years ago
The "XML2Assoc" functions noted here should be used with caution... basically they are duplicating the functionality already present in SimpleXML. They may work but they won't scale.
Their are two main uses cases for parsing XML, each suited to either XMLReader or SimpleXML.
1. SimpleXML is an excellent tool for easy access to an XML document tree using native PHP data types. It starts to flounder with massive (> 50M or so) XML documents, as it reads the entire document into memory before it can be processed. SimpleXML will just laugh at you then die when your server runs out of memory (or it will cause a load spike).
2. Aside from the reasoning behind massive XML documents, if you have to deal with massive XML documents, use XMLReader to process them. Don't try and gather an entire XML document into a PHP data structure using XMLReader and a PHP xml2assoc() function, you are reinventing the SimpleXML wheel.
When parsing massive XML documents using XMLReader, gather the data you need to perform an operation then perform it before skipping to the next node. Do not build massive data structures from a massive XML document, your server (and it's admins) will not like you.
jart (at) mail.ru ¶
14 years ago
Guys, I hope this example will help
you can erase prints showing the process-
and it will be a piece of nice code.
<?php
function xml2assoc($xml, $name)
{
print "<ul>";
$tree = null;
print("I'm inside " . $name . "<br>");
while($xml->read())
{
if($xml->nodeType == XMLReader::END_ELEMENT)
{
print "</ul>";
return $tree;
}
else if($xml->nodeType == XMLReader::ELEMENT)
{
$node = array();
print("Adding " . $xml->name ."<br>");
$node['tag'] = $xml->name;
if($xml->hasAttributes)
{
$attributes = array();
while($xml->moveToNextAttribute())
{
print("Adding attr " . $xml->name ." = " . $xml->value . "<br>");
$attributes[$xml->name] = $xml->value;
}
$node['attr'] = $attributes;
}
if(!$xml->isEmptyElement)
{
$childs = xml2assoc($xml, $node['tag']);
$node['childs'] = $childs;
}
print($node['tag'] . " added <br>");
$tree[] = $node;
}
else if($xml->nodeType == XMLReader::TEXT)
{
$node = array();
$node['text'] = $xml->value;
$tree[] = $node;
print "text added = " . $node['text'] . "<br>";
}
}
print "returning " . count($tree) . " childs<br>";
print "</ul>";
return $tree;
}
echo "<PRE>";
$xml = new XMLReader();
$xml->open('test.xml');
$assoc = xml2assoc($xml, "root");
$xml->close();
print_r($assoc);
echo "</PRE>";
?>
It reads this xml:
<test>
<hallo volume="loud"> me <br/> lala </hallo>
<hallo> me </hallo>
</test>
kula_shakerz ¶
11 years ago
Found this in the IXmlReader docs at msdn but it's also valid for XMLReader in PHP.
You should save the value of $isEmptyElement before processing attributes, or call moveToElement to make $isEmptyElement valid after processing attributes.
$isEmptyElement returns FALSE when XMLReader is positioned on an attribute node, even if attribute's parent element is empty.
godseth at o2 dot pl ¶
15 years ago
Thanks rein_baarsma33 AT hotmail DOT com for bugfixes.
This is my new child of XML parsing method based on my and yours modification.
XML2ASSOC Is a complete solution for parsing ordinary XML
<?php
/**
* XML2Assoc Class to creating
* PHP Assoc Array from XML File
*
* @author godseth (AT) o2.pl & rein_baarsma33 (AT) hotmail.com (Bugfixes in parseXml Method)
* @uses XMLReader
*
*/
class Xml2Assoc {
/**
* Optimization Enabled / Disabled
*
* @var bool
*/
protected $bOptimize = false;
/**
* Method for loading XML Data from String
*
* @param string $sXml
* @param bool $bOptimize
*/
public function parseString( $sXml , $bOptimize = false) {
$oXml = new XMLReader();
$this -> bOptimize = (bool) $bOptimize;
try {
// Set String Containing XML data
$oXml->XML($sXml);
// Parse Xml and return result
return $this->parseXml($oXml);
} catch (Exception $e) {
echo $e->getMessage();
}
}
/**
* Method for loading Xml Data from file
*
* @param string $sXmlFilePath
* @param bool $bOptimize
*/
public function parseFile( $sXmlFilePath , $bOptimize = false ) {
$oXml = new XMLReader();
$this -> bOptimize = (bool) $bOptimize;
try {
// Open XML file
$oXml->open($sXmlFilePath);
// // Parse Xml and return result
return $this->parseXml($oXml);
} catch (Exception $e) {
echo $e->getMessage(). ' | Try open file: '.$sXmlFilePath;
}
}
/**
* XML Parser
*
* @param XMLReader $oXml
* @return array
*/
protected function parseXml( XMLReader $oXml ) {
$aAssocXML = null;
$iDc = -1;
while($oXml->read()){
switch ($oXml->nodeType) {
case XMLReader::END_ELEMENT:
if ($this->bOptimize) {
$this->optXml($aAssocXML);
}
return $aAssocXML;
case XMLReader::ELEMENT:
if(!isset($aAssocXML[$oXml->name])) {
if($oXml->hasAttributes) {
$aAssocXML[$oXml->name][] = $oXml->isEmptyElement ? '' : $this->parseXML($oXml);
} else {
if($oXml->isEmptyElement) {
$aAssocXML[$oXml->name] = '';
} else {
$aAssocXML[$oXml->name] = $this->parseXML($oXml);
}
}
} elseif (is_array($aAssocXML[$oXml->name])) {
if (!isset($aAssocXML[$oXml->name][0]))
{
$temp = $aAssocXML[$oXml->name];
foreach ($temp as $sKey=>$sValue)
unset($aAssocXML[$oXml->name][$sKey]);
$aAssocXML[$oXml->name][] = $temp;
}
if($oXml->hasAttributes) {
$aAssocXML[$oXml->name][] = $oXml->isEmptyElement ? '' : $this->parseXML($oXml);
} else {
if($oXml->isEmptyElement) {
$aAssocXML[$oXml->name][] = '';
} else {
$aAssocXML[$oXml->name][] = $this->parseXML($oXml);
}
}
} else {
$mOldVar = $aAssocXML[$oXml->name];
$aAssocXML[$oXml->name] = array($mOldVar);
if($oXml->hasAttributes) {
$aAssocXML[$oXml->name][] = $oXml->isEmptyElement ? '' : $this->parseXML($oXml);
} else {
if($oXml->isEmptyElement) {
$aAssocXML[$oXml->name][] = '';
} else {
$aAssocXML[$oXml->name][] = $this->parseXML($oXml);
}
}
}
if($oXml->hasAttributes) {
$mElement =& $aAssocXML[$oXml->name][count($aAssocXML[$oXml->name]) - 1];
while($oXml->moveToNextAttribute()) {
$mElement[$oXml->name] = $oXml->value;
}
}
break;
case XMLReader::TEXT:
case XMLReader::CDATA:
$aAssocXML[++$iDc] = $oXml->value;
}
}
return $aAssocXML;
}
/**
* Method to optimize assoc tree.
* ( Deleting 0 index when element
* have one attribute / value )
*
* @param array $mData
*/
public function optXml(&$mData) {
if (is_array($mData)) {
if (isset($mData[0]) && count($mData) == 1 ) {
$mData = $mData[0];
if (is_array($mData)) {
foreach ($mData as &$aSub) {
$this->optXml($aSub);
}
}
} else {
foreach ($mData as &$aSub) {
$this->optXml($aSub);
}
}
}
}
}
?>
[EDIT BY danbrown AT php DOT net: Fixes were also provided by "Alex" and (qdog AT qview DOT org) in user notes on this page (since removed).]
dkrnl at yandex dot ru ¶
11 years ago
Wrapper XMLReader class, for simple SAX-reading huge xml:
https://github.com/dkrnl/SimpleXMLReader
Usage example: http://github.com/dkrnl/SimpleXMLReader/blob/master/examples/example1.php
<?php
/**
* Simple XML Reader
*
* @license Public Domain
* @author Dmitry Pyatkov(aka dkrnl) <dkrnl@yandex.ru>
* @url http://github.com/dkrnl/SimpleXMLReader
*/
class SimpleXMLReader extends XMLReader
{
/**
* Callbacks
*
* @var array
*/
protected $callback = array();
/**
* Add node callback
*
* @param string $name
* @param callback $callback
* @param integer $nodeType
* @return SimpleXMLReader
*/
public function registerCallback($name, $callback, $nodeType = XMLREADER::ELEMENT)
{
if (isset($this->callback[$nodeType][$name])) {
throw new Exception("Already exists callback $name($nodeType).");
}
if (!is_callable($callback)) {
throw new Exception("Already exists parser callback $name($nodeType).");
}
$this->callback[$nodeType][$name] = $callback;
return $this;
}
/**
* Remove node callback
*
* @param string $name
* @param integer $nodeType
* @return SimpleXMLReader
*/
public function unRegisterCallback($name, $nodeType = XMLREADER::ELEMENT)
{
if (!isset($this->callback[$nodeType][$name])) {
throw new Exception("Unknow parser callback $name($nodeType).");
}
unset($this->callback[$nodeType][$name]);
return $this;
}
/**
* Run parser
*
* @return void
*/
public function parse()
{
if (empty($this->callback)) {
throw new Exception("Empty parser callback.");
}
$continue = true;
while ($continue && $this->read()) {
if (isset($this->callback[$this->nodeType][$this->name])) {
$continue = call_user_func($this->callback[$this->nodeType][$this->name], $this);
}
}
}
/**
* Run XPath query on current node
*
* @param string $path
* @param string $version
* @param string $encoding
* @return array(SimpleXMLElement)
*/
public function expandXpath($path, $version = "1.0", $encoding = "UTF-8")
{
return $this->expandSimpleXml($version, $encoding)->xpath($path);
}
/**
* Expand current node to string
*
* @param string $version
* @param string $encoding
* @return SimpleXMLElement
*/
public function expandString($version = "1.0", $encoding = "UTF-8")
{
return $this->expandSimpleXml($version, $encoding)->asXML();
}
/**
* Expand current node to SimpleXMLElement
*
* @param string $version
* @param string $encoding
* @param string $className
* @return SimpleXMLElement
*/
public function expandSimpleXml($version = "1.0", $encoding = "UTF-8", $className = null)
{
$element = $this->expand();
$document = new DomDocument($version, $encoding);
$node = $document->importNode($element, true);
$document->appendChild($node);
return simplexml_import_dom($node, $className);
}
/**
* Expand current node to DomDocument
*
* @param string $version
* @param string $encoding
* @return DomDocument
*/
public function expandDomDocument($version = "1.0", $encoding = "UTF-8")
{
$element = $this->expand();
$document = new DomDocument($version, $encoding);
$node = $document->importNode($element, true);
$document->appendChild($node);
return $document;
}
}
?>
desk_ocean at msn dot com ¶
16 years ago
make some modify from Sergey Aikinkulov's note
<?php
function xml2assoc(&$xml){
$assoc = NULL;
$n = 0;
while($xml->read()){
if($xml->nodeType == XMLReader::END_ELEMENT) break;
if($xml->nodeType == XMLReader::ELEMENT and !$xml->isEmptyElement){
$assoc[$n]['name'] = $xml->name;
if($xml->hasAttributes) while($xml->moveToNextAttribute()) $assoc[$n]['atr'][$xml->name] = $xml->value;
$assoc[$n]['val'] = xml2assoc($xml);
$n++;
}
else if($xml->isEmptyElement){
$assoc[$n]['name'] = $xml->name;
if($xml->hasAttributes) while($xml->moveToNextAttribute()) $assoc[$n]['atr'][$xml->name] = $xml->value;
$assoc[$n]['val'] = "";
$n++;
}
else if($xml->nodeType == XMLReader::TEXT) $assoc = $xml->value;
}
return $assoc;
}
?>
add else if($xml->isEmptyElement)
may be some xml has emptyelement
boukeversteegh at gmail dot com ¶
15 years ago
XML to ASSOCIATIVE ARRAY
Improved algorithm based on Sergey Aikinkulov's. The problem was that it would overwrite nodes if they had the same tag name. Because of that <a><b/><b/><a> would be read as if <a><b/><a/>. This algorithm handles it better and outputs an easy to understand array:
<?php
function xml2assoc($xml) {
$tree = null;
while($xml->read())
switch ($xml->nodeType) {
case XMLReader::END_ELEMENT: return $tree;
case XMLReader::ELEMENT:
$node = array('tag' => $xml->name, 'value' => $xml->isEmptyElement ? '' : xml2assoc($xml));
if($xml->hasAttributes)
while($xml->moveToNextAttribute())
$node['attributes'][$xml->name] = $xml->value;
$tree[] = $node;
break;
case XMLReader::TEXT:
case XMLReader::CDATA:
$tree .= $xml->value;
}
return $tree;
}
?>
Usage:
myxml.xml:
------
<PERSON>
<NAME>John</NAME>
<PHONE type="home">555-555-555</PHONE>
</PERSON>
----
<?
$xml = new XMLReader();
$xml->open('myxml.xml');
$assoc = xml2assoc($xml);
$xml->close();
print_r($assoc);
?>
Outputs:
Array
(
[0] => Array
(
[tag] => PERSON
[value] => Array
(
[0] => Array
(
[tag] => NAME
[value] => John
)
[1] => Array
(
[tag] => PHONE
[value] => 555-555-555
[attributes] => Array
(
[type] => home
)
)
)
)
)
For reasons that have to do with recursion, it returns an array with the ROOT xml node as the first childNode, rather than to return only the ROOT node.
japos dot trash at googlemail dot com ¶
14 years ago
Take care about how to use XMLReader::$isElementEmpty. I don't know if it is a bug or not, but $isElementEmpty is set for the current context and NOT just for the element. If you move your cursor to an attribute, $isElementEmpty will ALWAYS be false.
<?php
$xml = new XMLReader();
$xml->XML('<tag attr="value" />');
$xml->read();
var_dump($xml->isEmptyElement);
$xml->moveToNextAttribute();
var_dump($xml->isEmptyElement);
?>
will output
(bool) true
(bool) false
So be sure to store $isEmptyElement before moving the cursor.
PxL ¶
15 years ago
A basic parser
<?php
function xml2assoc($xml) {
$arr = array();
if (!preg_match_all('|\<\s*?(\w+).*?\>(.*)\<\/\s*\\1.*?\>|s', $xml, $m)) return $xml;
if (is_array($m[1]))
for ($i = 0;$i < sizeof($m[1]); $i++) $arr[$m[1][$i]] = xml2assoc($m[2][$i]);
else $arr[$m[1]] = xml2assoc($m[2]);
return $arr;
}
?>
orion at ftf-hq dot dk ¶
18 years ago
Some more documentation (i.e. examples) would be nice :-)
This is how I read some mysql parameters in an xml file:
<?php
$xml = new XMLReader();
$xml->open("config.xml");
$xml->setParserProperty(2,true); // This seems a little unclear to me - but it worked :)
while ($xml->read()) {
switch ($xml->name) {
case "mysql_host":
$xml->read();
$conf["mysql_host"] = $xml->value;
$xml->read();
break;
case "mysql_username":
$xml->read();
$conf["mysql_user"] = $xml->value;
$xml->read();
break;
case "mysql_password":
$xml->read();
$conf["mysql_pass"] = $xml->value;
$xml->read();
break;
case "mysql_database":
$xml->read();
$conf["mysql_db"] = $xml->value;
$xml->read();
break;
}
}
$xml->close();
?>
The XML file used:
<?xml version='1.0'?>
<MySQL_INIT>
<mysql_host>localhost</mysql_host>
<mysql_database>db_database</mysql_database>
<mysql_username>root</mysql_username>
<mysql_password>password</mysql_password>
</MySQL_INIT>
Sergey Aikinkulov ¶
16 years ago
Next version xml2assoc with some improve fixes:
- no doubled data
- no buffer arrays
<?php
/*
Read XML structure to associative array
--
Using:
$xml = new XMLReader();
$xml->open([XML file]);
$assoc = xml2assoc($xml);
$xml->close();
*/
function xml2assoc($xml) {
$assoc = null;
while($xml->read()){
switch ($xml->nodeType) {
case XMLReader::END_ELEMENT: return $assoc;
case XMLReader::ELEMENT:
$assoc[$xml->name][] = array('value' => $xml->isEmptyElement ? '' : xml2assoc($xml));
if($xml->hasAttributes){
$el =& $assoc[$xml->name][count($assoc[$xml->name]) - 1];
while($xml->moveToNextAttribute()) $el['attributes'][$xml->name] = $xml->value;
}
break;
case XMLReader::TEXT:
case XMLReader::CDATA: $assoc .= $xml->value;
}
}
return $assoc;
}
?>
lee8oi at gmail dot com ¶
12 years ago
Sometimes you have an unusual URL that doesn't actually point to an xml file but still returns xml as output (Like the Battlefield Heroes generated syndication urls). Using get_file_contents(url) you can retrieve the xml data from these urls and pass it as a variable for processing as an XML String.
Unfortunately simpleXML or xml DOM cannot process all xml strings. Some have error boxes added to the end of them (such as Battlefield Heroes syndicated news). These boxes cause an end of file sort of error and closes out the script. XMLReader grabs data from these strings without error.
eef dot vreeland at gmail dot com ¶
7 years ago
Please discard my previous note; I pressed 'Add Note' too quickly
About (non-)self-closing tags:
A) <tag></tag>
$xmlRdr->isEmptyElement => false
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => false
B) <tag />
$xmlRdr->isEmptyElement => true
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => false
C) <tag attribute="value"></tag>
$xmlRdr->isEmptyElement => false
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => true
D) <tag attribute="value" />
$xmlRdr->isEmptyElement => true
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => true
... and always use the '===' operator when testing properties
eef dot vreeland at gmail dot com ¶
7 years ago
Note that when:
A) <tag></tag>
$xmlRdr->isEmptyElement => false
$xmlRdr->hasValue => true
$xmlRdr->value => ''
$xmlRdr->hasAttributes => false
B) <tag />
$xmlRdr->isEmptyElement => true
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => false
C) <tag attribute="value"></tag>
$xmlRdr->isEmptyElement => false
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => true
D) <tag attribute="value" />
$xmlRdr->isEmptyElement => true
$xmlRdr->hasValue => false
$xmlRdr->value => ''
$xmlRdr->hasAttributes => true
casella dot email at google dot mail dot com ¶
12 years ago
To verify that all nodes are read without error/warning you can use this code:
<?php
$endofxml = false;
$xml_url = "example.xml";
$reader = new XMLReader();
if(!$reader->open($xml_url)){
print "Error to open XML: $xml_url\n";
} else {
while ($reader->read()) {
$firstnode = (!isset($firstnode)) ? $reader->name : $firstnode;
/*
DO SOMETHING
*/
if ($reader->nodeType == XMLReader::END_ELEMENT && $reader->name == $firstnode) {
$endofxml = true;
}
}
}
if($endofxml) {
print "no error found";
} else {
print "error found";
}
?>
This code is useful to trap $reader->read() error/warning.
itari ¶
16 years ago
<?php
function parseXML($node,$seq,$path) {
global $oldpath;
if (!$node->read())
return;
if ($node->nodeType != 15) {
print '<br/>'.$node->depth;
print '-'.$seq++;
print ' '.$path.'/'.($node->nodeType==3?'text() = ':$node->name);
print $node->value;
if ($node->hasAttributes) {
print ' [hasAttributes: ';
while ($node->moveToNextAttribute()) print '@'.$node->name.' = '.$node->value.' ';
print ']';
}
if ($node->nodeType == 1) {
$oldpath=$path;
$path.='/'.$node->name;
}
parseXML($node,$seq,$path);
}
else parseXML($node,$seq,$oldpath);
}
$source = "<tag1>this<tag2 id='4' name='foo'>is</tag2>a<tag2 id='5'>common</tag2>record</tag1>";
$xml = new XMLReader();
$xml->XML($source);
print htmlspecialchars($source).'<br/>';
parseXML($xml,0,'');
?>
Output:
<tag1>this<tag2 id='4' name='foo'>is</tag2>a<tag2 id='5'>common</tag2>record</tag1>
0-0 /tag1
1-1 /tag1/text() = this
1-2 /tag1/tag2 [hasAttributes: @id = 4 @name = foo ]
2-3 /tag1/text() = is
1-4 /text() = a
1-5 /tag2 [hasAttributes: @id = 5 ]
2-6 /text() = common
1-7 /text() = record
andrei_antal at yahoo dot com ¶
15 years ago
<?php
//Pull certain elements
$reader = new XMLReader();
$reader->open($xmlfile);
while ($reader->read()) {
switch ($reader->nodeType) {
case (XMLREADER::ELEMENT):
if ($reader->name == "Code")
{
$reader->read();
$code = trim($reader->value);
echo "$code\n";
break;
}
if ($reader->name == "Name")
{
$reader->read();
$customername = trim( $reader->value );
echo "$name\n";
break;
}
if ($reader->name == "Camp")
{
$camp = trim($reader->getAttribute("ID"));
echo "$camp\n";
break;
}
}
}
?>
Mike De Smet ¶
12 years ago
For those of you getting xml files that do not contain duplicate elements (in the same element), the following converter converts to arrays with key/value mapping (thus overwriting duplicate elements!):
Note this is untested with attributes although I built in support.
<?php
function xml2assoc($xml, array &$target = array()) {
while ($xml->read()) {
switch ($xml->nodeType) {
case XMLReader::END_ELEMENT:
return $target;
case XMLReader::ELEMENT:
$name = $xml->name;
$target[$name] = $xml->hasAttributes ? array() : '';
if (!$xml->isEmptyElement) {
$target[$name] = array();
xml2assoc($xml, $target[$name]);
}
if ($xml->hasAttributes)
while($xml->moveToNextAttribute())
$target[$name]['@'.$xml->name] = $xml->value;
break;
case XMLReader::TEXT:
case XMLReader::CDATA:
$target = $xml->value;
}
}
return $target;
}
?>
jnettles at inccrra dot org ¶
15 years ago
Just in case someone is confused, if you're wanting to simply pass a string of XML instead of an entire file, you would do this.
<?php
$foo = new XMLReader();
$foo->xml($STRING);
?>
.... where $STRING holds your XML. You cannot pass it like $foo = $STRING or $foo->xml = $STRING.
