To further previous comments and drive the point home:
What makes SimpleXMLElement tricky to work with is that it feels and behaves like an object, but is actually a system RESOURCE, (specifically a libxml resource).
That's why you can't store a SimpleXMLElement to $_SESSION or perform straight comparison operations on node values without first casting them to some type of object. $_SESSION expects to store 'an object' and comparison operators expect to compare 2 'objects' and SimpleXMLElements are not objects.
When you echo or print a node's value, PHP converts the value (a resource) into a string object for you. It's a time saver for sure, but can fool you into thinking that your SimpleXMLElement is an object.
Hope this helps clarifyYou are here
PHP SimpleXML SimpleXMLElement 对象 有大用
PHP 使用 SimpleXML 來解析 XML 內容、屬性
PHP 可以使用 simplexml_load_string、simplexml_load_file 來解析 XML, 以取得內容.
程式 與 XML 內容
<?php
$string = <<<XML
<?xml version='1.0'?>
<document responsecode="200">
<result count="10" start="0" totalhits="133047950">
<title>Test</title>
<from>Jon</from>
<to>Tsung</to>
</result>
</document>
XML;
$xml = simplexml_load_string($string);
print_r($xml);
?>
XML 解析 的 內容會回傳一個物件
SimpleXMLElement Object
(
[@attributes] => Array
(
[responsecode] => 200
)
[result] => SimpleXMLElement Object
(
[@attributes] => Array
(
[count] => 10
[start] => 0
[totalhits] => 13304
)
[title] => Test
[from] => Jon
[to] => Tsung
)
)
如何取用此物件回傳的值
取得 result 下的 title
- $xml->result->title; // Test (object)
- 建議: (string)$xml->result->title; // 強迫轉換成字串
取得屬性的值(@attributes)
- $xml->result->attributes()->totalhits; // 13304 (object), 一樣建議於前面加 (strval)
- 或
- $result_attr = $xml->result->attributes();
$result_attr['totalhits']; // 13304 (object), 一樣建議於前面加 (strval)
PHP 使用 SimpleXML 來解析 XML 內容、屬性 有 15 則回應
http://blog.longwin.com.tw/2009/10/php-simplexml-parse-attr-content-2009/he SimpleXMLElement class
(PHP 5 >= 5.0.1)
Introduction
Represents an element in an XML document.
Class synopsis
SimpleXMLElement implements Traversable {
/* Methods */
final public __construct ( string
}$data [, int $options = 0 [, bool $data_is_url = false [,string $ns = "" [, bool $is_prefix = false ]]]] )Table of Contents
- SimpleXMLElement::addAttribute — Adds an attribute to the SimpleXML element
- SimpleXMLElement::addChild — Adds a child element to the XML node
- SimpleXMLElement::asXML — Return a well-formed XML string based on SimpleXML element
- SimpleXMLElement::attributes — Identifies an element's attributes
- SimpleXMLElement::children — Finds children of given node
- SimpleXMLElement::__construct — Creates a new SimpleXMLElement object
- SimpleXMLElement::count — Counts the children of an element
- SimpleXMLElement::getDocNamespaces — Returns namespaces declared in document
- SimpleXMLElement::getName — Gets the name of the XML element
- SimpleXMLElement::getNamespaces — Returns namespaces used in document
- SimpleXMLElement::registerXPathNamespace — Creates a prefix/ns context for the next XPath query
- SimpleXMLElement::saveXML — Alias of SimpleXMLElement::asXML
- SimpleXMLElement::__toString — Returns the string content
- SimpleXMLElement::xpath — Runs XPath query on XML data
add a noteUser Contributed Notes 19 notes
40
4 years ago
31
3 years ago
To access the underlying element as a string, it's necessary to make the cast $x = (string)$my_xml_element.5
1 year ago
Important note I miss here in the documentation:
SimpleXML supports Array/Iteration-Methods. Therefore it is possible to
add attributes
edit attributes
remove attributes
add nodes
edit nodes
remove nodes
This is the reason why SimpleXML provides only add-methods not deleting- or editing-methods. We also need this methods because SimpleXML acts as a normal class and
new member will not converted to a new node.
Deleting a node seems not to be possible within a foreach-loop. The reason is simple. To do that we need a valid key, but the Iterator only gives us a "understandable feedback" on which node we are working on: the tag name.
So this will not work:
<?php
foreach($doc->seg as $key => $seg)
{
if((string)$seg['id'] === 'whatever')
{
unset($seg); // only clears local copy
unset($seg[$key]); // wrong index "seg"
}
}
?>
But this, eg. will work:
<?php
unset($doc->seg[2]);
?>
In case of doubt always do a print_r/var_dump(). It nicely shows the real linked indexes.13
3 years ago
Warning to anyone trying to parse XML with a key name that includes a hyphen ie.)
<subscribe>
<callback-url>example url</callback-url>
</subscribe>
In order to access the callback-url you will need to do something like the following:
<?php
$xml = simplexml_load_string($input);
$callback = $xml->{"callback-url"};
?>
If you attempt to do it without the curly braces and quotes you will find out that you are returned a 0 instead of what you want.4
4 years ago
Note that changing attributes from within a foreach loop, especially namespaced attributes, can be very tricky.
For example, when trying to change the value of an existing xlink:href attribute:
<?php
foreach($xmlelement -> attributes('xlink', true) as $attribute => $attribvalue){
$attribvalue[0] = 'value'; // Throws an error
$attribvalue = 'value'; // Does not change your XML
$xmlelement -> addAttribute($attribute, 'value', 'http://www.w3.org/1999/xlink'); // Adds an attribute, does not change existing one.
$xmlelement[$attribute] = 'value'; // Adds an attribute, does not change existing one.
}
?>
Instead, you should access the array returned by the attributes() function directly, like this:
<?php
$xmlelement -> attributes('xlink', true) -> href = 'value'; // Works!
?>3
3 years ago
Parsing an invalid XML string through SimpleXML causes the script to crash completely (usually) therefore it is best to make sure the XML is valid before parsing with something like this:
// Must be tested with ===, as in if(isXML($xml) === true){}
// Returns the error message on improper XML
function isXML($xml){
libxml_use_internal_errors(true);
$doc = new DOMDocument('1.0', 'utf-8');
$doc->loadXML($xml);
$errors = libxml_get_errors();
if(empty($errors)){
return true;
}
$error = $errors[0];
if($error->level < 3){
return true;
}
$explodedxml = explode("r", $xml);
$badxml = $explodedxml[($error->line)-1];
$message = $error->message . ' at line ' . $error->line . '. Bad XML: ' . htmlentities($badxml);
return $message;
}4
2 years ago
XML to JSON conversion without '@attributes'
<?php
function XML2JSON($xml) {
function normalizeSimpleXML($obj, &$result) {
$data = $obj;
if (is_object($data)) {
$data = get_object_vars($data);
}
if (is_array($data)) {
foreach ($data as $key => $value) {
$res = null;
normalizeSimpleXML($value, $res);
if (($key == '@attributes') && ($key)) {
$result = $res;
} else {
$result[$key] = $res;
}
}
} else {
$result = $data;
}
}
normalizeSimpleXML(simplexml_load_string($xml), $result);
return json_encode($result);
}
?>1
5 years ago
Hello,
here goes my contribution for those whom are struggling to understand how SimpleXMLElement works.
After some time trying to figure out how this works, I've came up to this small example:
<?php
$xmlstr = "<?xml version='1.0' ?>\n".
// optionally you can specify a xml-stylesheet for presenting the results. just uncoment the following line and change the stylesheet name.
/* "<?xml-stylesheet type='text/xsl' href='xml_style.xsl' ?>\n". */
"<book></book>";
// create the SimpleXMLElement object with an empty <book> element
$xml = new SimpleXMLElement($xmlstr);
// add some child nodes
$xml->addChild("title", "Title of my book");
$xml->addChild("abstract", "My book is about learning to work with SimpleXMLElement");
// add some more child nodes
$chapter1 = $xml->addChild("chapter_1");
// add an attribute to child chapter_1
$chapter1->addAttribute("chapter_title", "Introduction to my book");
$chapter2 = $xml->addChild("chapter_2");
$chapter2->addAttribute("chapter_title", "Development of my book");
$chapter3 = $xml->addChild("chapter_3");
$chapter3->addAttribute("chapter_title", "Another chapter of my book");
$conclusion = $xml->addChild("conclusion", "The ending of my book");
// insert the header to tell the browser how to read the document
header("Content-type: text/xml");
// print the SimpleXMLElement as a XML well-formed string
echo $xml->asXML();
?>
With this script you can just copy-paste and try to understand how it works.
I hope it can help somebody :)4
5 years ago
Figuring out how to access the properties of a SimpleXmlElement object was a little tricky for me. In particular, it took a while to discover that I needed to cast my SimpleXmlElement properties to be of type "string" to print them or do comparisons on them. For instance, assuming you already have a string of xml in $xmlstr...
<?php
$sxml= new SimpleXmlElement($xmlstr);
if ((string) $sxml->property== "somevalue") {
echo (string) $sxml->property;
}
?>
The properties of a SimpleXmlElement object are objects themselves, so you need to put "(string)" before them, which casts their values to a string instead of an object. I assume if you were doing a numeric comparison you'd want to cast to an (int) or something numeric instead.3
4 years ago
Be aware when you trying to cast some attribute to boolean.
(boolean)$xml->attributes()->someAtt;
returns TRUE if attribute is array([0] => 0);
use (boolean)(int) instead.1
3 years ago
Here is a more namespace-aware version of the earlier function for attaching one SimpleXMLElement to another. I'm sure it could still be further improved (right now it generates some redundant xmlns definitions), but it seems to be working well enough for my purposes so far.
function SimpleXMLElement_append($parent, $child)
{
// get all namespaces for document
$namespaces = $child->getNamespaces(true);
// check if there is a default namespace for the current node
$currentNs = $child->getNamespaces();
$defaultNs = count($currentNs) > 0 ? current($currentNs) : null;
$prefix = (count($currentNs) > 0) ? current(array_keys($currentNs)) : '';
$childName = strlen($prefix) > 1
? $prefix . ':' . $child->getName() : $child->getName();
// check if the value is string value / data
if (trim((string) $child) == '') {
$element = $parent->addChild($childName, null, $defaultNs);
} else {
$element = $parent->addChild(
$childName, htmlspecialchars((string)$child), $defaultNs
);
}
foreach ($child->attributes() as $attKey => $attValue) {
$element->addAttribute($attKey, $attValue);
}
foreach ($namespaces as $nskey => $nsurl) {
foreach ($child->attributes($nsurl) as $attKey => $attValue) {
$element->addAttribute($nskey . ':' . $attKey, $attValue, $nsurl);
}
}
// add children -- try with namespaces first, but default to all children
// if no namespaced children are found.
$children = 0;
foreach ($namespaces as $nskey => $nsurl) {
foreach ($child->children($nsurl) as $currChild) {
SimpleXMLElement_append($element, $currChild);
$children++;
}
}
if ($children == 0) {
foreach ($child->children() as $currChild) {
SimpleXMLElement_append($element, $currChild);
}
}
}2
4 years ago
You should cast elements to a float (or even string) if you plan on using them in addition, multiplication, etc. If you don't then PHP will incorrectly treat the node values as an integer.
<?php
$obj = new SimpleXMLElement('<root>
<a>1.9</a>
<b>1.9</b>
</root>');
var_dump($obj->a + $obj->b);
var_dump((float)$obj->a + (float)$obj->b);
var_dump((string)$obj->a + (string)$obj->b);
?>
The first line gives: int(2)
The second and third give the expected result: float(3.8)1
5 years ago
The root node element of your input XML string is not retrievable as a property.
<?php
$xml="<foo>bar</foo>";
$sxe=new SimpleXMLElement($xml);
print $sxe->foo;
?>
prints nothing. You can only get to the root element via the array index method ($sxe[0]).
Also, you may not have two (or more) root elements -- that is apparently not well-formed XML.
<?php
$xml="<foo/><bar/>";
$sxe=new SimpleXMLElement($xml);
?>
throws an exception. A Q&D is to append an arbitraty root node structure to both ends of the input:
<?php
$xml="<foo/><bar/>";
$sxe=new SimpleXMLElement("<z>".$xml."</z>");
?>
Doing this also solves the above problem of root node property accessibility. (It may not work if your XML string includes a declaration.)1
5 years ago
It's occasionally useful to add an XML processing instruction to a SimpleXMLElement (treating it as if it were a full document).
<?php
class SimpleXMLElement_Plus extends SimpleXMLElement {
public function addProcessingInstruction( $name, $value )
{
// Create a DomElement from this simpleXML object
$dom_sxe = dom_import_simplexml($this);
// Create a handle to the owner doc of this xml
$dom_parent = $dom_sxe->ownerDocument;
// Find the topmost element of the domDocument
$xpath = new DOMXPath($dom_parent);
$first_element = $xpath->evaluate('/*[1]')->item(0);
// Add the processing instruction before the topmost element
$pi = $dom_parent->createProcessingInstruction($name, $value);
$dom_parent->insertBefore($pi, $first_element);
}
}
?>
For example, if you had a simpleXMLElement_Plus object made out of the xml fragment:
<xml><content /></xml>
And you needed the output to be:
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="xsl/xsl.xsl"?>
<xml><content/></xml>
you could do (using the class above):
<?php
$xml = new SimpleXMLElement_Plus('<xml><content /></xml>');
$xml->addProcessingInstruction('xml-stylesheet', 'type="text/xsl" href="xsl/xsl.xsl"');
echo $xml->asXML();
?>1
2 years ago
xml to object conversion function :
<?php
/**
@param:
$xml: SimpleXMLElement
$force: set to true to always create 'text', 'attribute', and 'children' even if empty
@return
object with attributs:
(string) name: XML tag name
(string) text: text content of the attribut name
(array) attributes: array witch keys are attribute key and values are attribute value
(array) children: array of objects made with xml2obj() on each child
**/
function xml2obj($xml,$force = false){
$obj = new StdClass();
$obj->name = $xml->getName();
$text = trim((string)$xml);
$attributes = array();
$children = array();
foreach($xml->attributes() as $k => $v){
$attributes[$k] = (string)$v;
}
foreach($xml->children() as $k => $v){
$children[] = xml2obj($v,$force);
}
if($force or $text !== '')
$obj->text = $text;
if($force or count($attributes) > 0)
$obj->attributes = $attributes;
if($force or count($children) > 0)
$obj->children = $children;
return $obj;
}
?>2
4 years ago
Adds a new function for SimpleXMLElement class, in order to output HTML code.
<?php
class CeiXML extends SimpleXMLElement{
public function asHTML(){
$ele=dom_import_simplexml($this);
$dom = new DOMDocument('1.0', 'utf-8');
$element=$dom->importNode($ele,true);
$dom->appendChild($element);
return $dom->saveHTML();
}
}
?>-1
4 years ago
Simple recursive function to append XML object into SimpleXMLElement node:
<?php
// root: parent element - SimpleXMLElement instance
// append: XML object from simplexml_load_string
function xml_join($root, $append) {
if ($append) {
if (strlen(trim((string) $append))==0) {
$xml = $root->addChild($append->getName());
foreach($append->children() as $child) {
xml_join($xml, $child);
}
} else {
$xml = $root->addChild($append->getName(), (string) $append);
}
foreach($append->attributes() as $n => $v) {
$xml->addAttribute($n, $v);
}
}
}
$xml_append = simplexml_load_string('<data><items><item id="1">value</item></items></data>');
$xml_root = new SimpleXMLElement('<result></result>');
$cxml = $xml_root->addChild('clone');
xml_join($cxml, $xml_append->items->item[0]);
print $xml_root->asXML();
?>
Result:
<?xml version="1.0"?>
<result>
<clone>
<item id="1">
value
</item>
</clone>
</result>-1
4 years ago
I'm using SimpleXML for, ofcourse, it's simplicity, however I did wanted to manipulate the xml and combining one SimpleXMLElement with any other, so I wrote this function to add a SimpleXMLElement-child.
<?php
function SimpleXMLElement_append($key, $value) {
// check class
if ((get_class($key) == 'SimpleXMLElement') && (get_class($value) == 'SimpleXMLElement')) {
// check if the value is string value / data
if (trim((string) $value) == '') {
// add element and attributes
$element = $key->addChild($value->getName());
foreach ($value->attributes() as $attKey => $attValue) {
$element->addAttribute($attKey, $attValue);
}
// add children
foreach ($value->children() as $child) {
SimpleXMLElement_append($element, $child);
}
} else {
// set the value of this item
$element = $key->addChild($value->getName(), trim((string) $value));
}
} else {
// throw an error
throw new Exception('Wrong type of input parameters, expected SimpleXMLElement');
}
}
?>
I'd recommend SimpleXMLElement to extend it's addChild() function with the functionalitity above.-4
3 years ago
I created a little function to parse the simple XML into a structure which is easier to iterate(I believe anyways) than the simpleXML node structure.
<?php
function parseSimpleXML($xmldata)
{
$childNames = array();
$children = array();
if( $xmldata->count() !== 0 )
{
foreach( $xmldata->children() AS $child )
{
$name = $child->getName();
if( !isset($childNames[$name]) )
{
$childNames[$name] = 0;
}
$childNames[$name]++;
$children[$name][] = $this->parseSimpleXML($child);
}
}
$returndata = new XMLNode();
if( $xmldata->attributes()->count() > 0 )
{
$returndata->{'@attributes'} = new XMLAttribute();
foreach( $xmldata->attributes() AS $name => $attrib )
{
$returndata->{'@attributes'}->{$name} = (string)$attrib;
}
}
if( count($childNames) > 0 )
{
foreach( $childNames AS $name => $count )
{
if( $count === 1 )
{
$returndata->{$name} = $children[$name][0];
}
else
{
$returndata->{$name} = new XMLMultiNode();
$counter = 0;
foreach( $children[$name] AS $data )
{
$returndata->{$name}->{$counter} = $data;
$counter++;
}
}
}
}
else
{
if( (string)$xmldata !== '' )
{
$returndata->{'@innerXML'} = (string)$xmldata;
}
}
return $returndata;
}
?>普通分类:
像是 $xml->result->title; 取回的資料會是 SimpleXML 的物件..並非 String 或是 Int ...
有時候在傳入其他參數或是 mysql 的時候, 最好要強迫型態轉換.
感恩, 我沒注意到居然是 object, 馬上補上~
您好:
我可以請教您一個關於如何將xml的資料，匯入mysql的資料庫的問題嗎?
把 XML parse 成 array, 再寫個 foreach 寫入 MySQL 就好了呀.
您好:
如果，我可以給我將檔案寄給您，您可以幫我將如何做，才能把這個xml檔，匯入sql的的操作說明，錄製成操作錄影檔嗎?
需要多少費用?
我的msn:ut5591066@hotmail.com
skype:ut5553616 富爸爸水電工
你先寄一部份 XML 和要 匯入DB 的 schema 給我看看?
順便問問這個的用途是? 商用? or ?
我先把xml寄給您。
我是要做商品目錄，做成產品鏈結，幫廠商賣產品，賣出去就可以抽佣金。(類似通路王)
因為，廠商的產品太多了，而且廠商有提供xml檔。
至於資料庫，因為，我目前是用osc的。
如果，用osc的不好做，可以另外開一個新的資料庫。
Blog 左邊列有 My Mail, 可以先寄一些讓我看看, 還有要對應哪些欄位等等.
您好~我想請教
如果我透過post的方式取得遠端xml的值 然後使用
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 3); //times out after 4s
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_POST,count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS,$fields_string);
$result=curl_exec($ch);
print_r($result);
的方式
輸出的值會是 張先生chung@aaa.com台北市松山區......這樣黏在一起
請問我該如何各別取得變數植呢?
例如 $name="張先生";
$email="chung@aaa.com";
不知道前輩是不是可以幫我解答?
感謝
依照你最前面講得 "取得遠端xml的值", 那你現在的 $result 應該是 XML, 而不是連在一起的字串.
print_r(simplexml_load_string($result));
就可以了.
前輩 使用了您說的方法 是可以列出所有的值 如下列
SimpleXMLElement Object ( [errorCode] => SimpleXMLElement Object ( ) [userLoginStatus] => true [userAccount] => chung@teme.biz [userId] => 127081 [userName] => 張先生 [userNickname] => chung [userTel] => 02-27658888 [userMobile] => 0920-555-265
但如果我想要取得單獨欄位值我該怎麼下指令
例如我只想要得到[userNickname]
抱歉問了好像很笨的問題...
但還有希望前輩能夠給予指導
不勝感激
$x = simple...($result);
echo $x->userNickname;
這些已經是基本能力了, 建議您在加強點基礎.
謝謝前輩...我會的..感謝