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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Serializer\Adapter;
use Zend\Serializer\Exception;
use Zend\Stdlib\ErrorHandler;
/**
* @link http://www.infoloom.com/gcaconfs/WEB/chicago98/simeonov.HTM
* @link http://en.wikipedia.org/wiki/WDDX
*/
class Wddx extends AbstractAdapter
{
/**
* @var WddxOptions
*/
protected $options = null;
/**
* Constructor
*
* @param array|\Traversable|WddxOptions $options
* @throws Exception\ExtensionNotLoadedException if wddx extension not found
*/
public function __construct($options = null)
{
if (!extension_loaded('wddx')) {
throw new Exception\ExtensionNotLoadedException(
'PHP extension "wddx" is required for this adapter'
);
}
parent::__construct($options);
}
/**
* Set options
*
* @param array|\Traversable|WddxOptions $options
* @return Wddx
*/
public function setOptions($options)
{
if (!$options instanceof WddxOptions) {
$options = new WddxOptions($options);
}
$this->options = $options;
return $this;
}
/**
* Get options
*
* @return WddxOptions
*/
public function getOptions()
{
if ($this->options === null) {
$this->options = new WddxOptions();
}
return $this->options;
}
/**
* Serialize PHP to WDDX
*
* @param mixed $value
* @return string
* @throws Exception\RuntimeException on wddx error
*/
public function serialize($value)
{
$comment = $this->getOptions()->getComment();
ErrorHandler::start();
if ($comment !== '') {
$wddx = wddx_serialize_value($value, $comment);
} else {
$wddx = wddx_serialize_value($value);
}
$error = ErrorHandler::stop();
if ($wddx === false) {
throw new Exception\RuntimeException('Serialization failed', 0, $error);
}
return $wddx;
}
/**
* Unserialize from WDDX to PHP
*
* @param string $wddx
* @return mixed
* @throws Exception\RuntimeException on wddx error
* @throws Exception\InvalidArgumentException if invalid xml
*/
public function unserialize($wddx)
{
$ret = wddx_deserialize($wddx);
if ($ret === null && class_exists('SimpleXMLElement', false)) {
// check if the returned NULL is valid
// or based on an invalid wddx string
try {
$oldLibxmlDisableEntityLoader = libxml_disable_entity_loader(true);
$dom = new \DOMDocument;
$dom->loadXML($wddx);
foreach ($dom->childNodes as $child) {
if ($child->nodeType === XML_DOCUMENT_TYPE_NODE) {
throw new Exception\InvalidArgumentException(
'Invalid XML: Detected use of illegal DOCTYPE'
);
}
}
$simpleXml = simplexml_import_dom($dom);
//$simpleXml = new \SimpleXMLElement($wddx);
libxml_disable_entity_loader($oldLibxmlDisableEntityLoader);
if (isset($simpleXml->data[0]->null[0])) {
return; // valid null
}
throw new Exception\RuntimeException('Unserialization failed: Invalid wddx packet');
} catch (\Exception $e) {
throw new Exception\RuntimeException('Unserialization failed: ' . $e->getMessage(), 0, $e);
}
}
return $ret;
}
}
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