Funções da SimpleXML
simplexml doesn't appear to like long attributes. I have tried passing it a valid xhtml document but the url in the anchor tag was causing simplexml to generate an error.
simplexml_load_string
(PHP 5)
simplexml_load_string — Transforma uma string XML em objeto
Descrição
object simplexml_load_string
( string $data
[, string $class_name
[, int $options
[, string $ns
[, bool $is_prefix
]]]] )
Recebe uma string XML bem formada (well-formed) e retorna um objeto.
Parâmetros
- data
-
Uma string XML bem formada
- class_name
-
Você pode utilizar o parâmetro opcional simplexml_load_string() para retornar um objeto da classe especificada. the specified class. Esta classe deve extender a classe SimpleXMLElement.
- options
-
A partir do PHP 5.1.0 e da Libxml 2.6.0, você pode também utilizar o parâmetro options para especificar parâmetros adicionais da Libxml.
- ns
-
- is_prefix
-
Valor Retornado
Retorna um objeto da classe SimpleXMLElement com propriedades contendo os dados do documento XML. Quando houver erro, irá retornar FALSE.
Exemplos
Exemplo #1 Interpreta uma string XML
<?php
$string = <<<XML
<?xml version='1.0'?>
<document>
<title>Forty What?</title>
<from>Joe</from>
<to>Jane</to>
<body>
I know that's the answer -- but what's the question?
</body>
</document>
XML;
$xml = simplexml_load_string($string);
var_dump($xml);
?>
O exemplo acima irá imprimir:
SimpleXMLElement Object ( [title] => Forty What? [from] => Joe [to] => Jane [body] => I know that's the answer -- but what's the question? )
Nesse ponto você já pode utilizar $xml->body para acessar as propriedades.
add a note
User Contributed Notessimplexml_load_string
nospam at qool dot com
05-Jun-2008 08:45
05-Jun-2008 08:45
hattori at hanso dot com
16-Oct-2007 12:19
16-Oct-2007 12:19
Theres a problem with the below workaround when serializing fields containing html CDATA. For any other content type then HTML try to modfiy function parseCDATA.
Just add these lines before serializing.
This is also a workaround for this bug http://bugs.php.net/bug.php?id=42001
<?PHP
if(strpos($content, '<![CDATA[')) {
function parseCDATA($data) {
return htmlentities($data[1]);
}
$content = preg_replace_callback(
'#<!\[CDATA\[(.*)\]\]>#',
'parseCDATA',
str_replace("\n", " ", $content)
);
}
?>
hattori at hanso dot com
17-Sep-2007 11:15
17-Sep-2007 11:15
If you want to serialize and unserialize SimpleXMLElement objects for caching, you need to transform the SimpleXMLElement object into a standard class object before unserializing.
This is only if you want to cache converted data, the functionallity of the SimpleXMLElement will not be held.
$content = '<SomeXML....'
$serialized = str_replace(
array('O:16:"SimpleXMLElement":0:{}', 'O:16:"SimpleXMLElement":'),
array('s:0:"";', 'O:8:"stdClass":'),
serialize(simplexml_load_string($content))
);
$unserialized = unserialize($serialized);
nbijnens at servs dot eu
10-Sep-2007 02:17
10-Sep-2007 02:17
Please note that not all LIBXML options are supported with the options argument.
For instance LIBXML_XINCLUDE does not work. But there is however a work around:
<?php
$xml = new DOMDocument();
$xml->loadXML ($XMLString);
$xml->xinclude();
$xml = simplexml_import_dom($xml);
?>
Pedro
06-Jul-2007 10:28
06-Jul-2007 10:28
Attention:
simplexml_load_string has a problem with entities other than (<, >, &, " and ').
Use numeric character references instead!
youx_free_fr
23-May-2007 06:52
23-May-2007 06:52
While needing to add an xml subtree to an existing simplexml object, I noticed that simplexml_load_string fails with strings like
<emptynode></emptynode>
I needed to use dom instead of simplexml to bypass this problem and work with any kind of xml strings.
David Somerset
08-May-2007 08:39
08-May-2007 08:39
Another option for having simplexml convert CDATA into plain text is to simply type cast the result to string. Here's an example:
$xmlRoot = simplexml_load_string('<?xml version="1.0"?>
<tvshows>
<show>
<name>The Simpsons</name>
</show>
<show>
<name><![CDATA[Lois & Clark]]></name>
</show>
</tvshows>');
$show = array();
foreach($xmlRoot as $val){
$show[] = (string) $val->name;
}
php at teamhirsch dot com
24-Apr-2007 11:46
24-Apr-2007 11:46
It's worth noting that in the example above, $xml->body will actually return an object of type SimpleXMLElement, not a string, e.g.
SimpleXMLElement Object (
[0] => this is the text in the body tag
)
If you want to get a string out of it you must explicitly cast it using (string) or double quotes, or pass $xml->body (or whatever attribute you want to access) to any function that returns a string, such as urldecode() or trim().
m dot ament at mailcity dot com
06-Mar-2007 03:51
06-Mar-2007 03:51
Warning:
The parsing of XML-data will stop when reaching character 0.
Please avoid this character in your XML-data.
mindpower
30-Jan-2007 12:03
30-Jan-2007 12:03
A simple extension that adds a method for retrieving a specific attribute:
<?php
class simple_xml_extended extends SimpleXMLElement
{
public function Attribute($name)
{
foreach($this->Attributes() as $key=>$val)
{
if($key == $name)
return (string)$val;
}
}
}
$xml = simplexml_load_string('
<xml>
<dog type="poodle" owner="Mrs Smith">Rover</dog>
</xml>', 'simple_xml_extended');
echo $xml->dog->Attribute('type');
?>
outputs 'poodle'
I prefer to use this technique rather than typecasting attributes.
h
15-Nov-2006 07:44
15-Nov-2006 07:44
seems like simplexml has a line-length restriction - fails if a largeish XML doc with no linebreaks is passed as a string or file.
h
paul at santasoft dot com
25-Jul-2006 05:22
25-Jul-2006 05:22
If you have PHP > 5.1 and LibXML > 2.6, use this function call to have simplexml convert CDATA into plain text.
simplexml_load_string($xmlstring, 'SimpleXMLElement', LIBXML_NOCDATA);
Too bad, so sad with PHP < 5.1.