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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Config
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Xml.php 17267 2009-07-29 02:13:18Z yoshida@zend.co.jp $
*/
/**
* @see Zend_Config
*/
require_once 'Zend/Config.php';
/**
* XML Adapter for Zend_Config
*
* @category Zend
* @package Zend_Config
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Config_Xml extends Zend_Config
{
/**
* XML namespace for ZF-related tags and attributes
*/
const XML_NAMESPACE = 'http://framework.zend.com/xml/zend-config-xml/1.0/';
/**
* Wether to skip extends or not
*
* @var boolean
*/
protected $_skipExtends = false;
/**
* Loads the section $section from the config file (or string $xml for
* access facilitated by nested object properties.
*
* Sections are defined in the XML as children of the root element.
*
* In order to extend another section, a section defines the "extends"
* attribute having a value of the section name from which the extending
* section inherits values.
*
* Note that the keys in $section will override any keys of the same
* name in the sections that have been included via "extends".
*
* @param string $xml XML file or string to process
* @param mixed $section Section to process
* @param boolean $options Whether modifiacations are allowed at runtime
* @throws Zend_Config_Exception When xml is not set or cannot be loaded
* @throws Zend_Config_Exception When section $sectionName cannot be found in $xml
*/
public function __construct($xml, $section = null, $options = false)
{
if (empty($xml)) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception('Filename is not set');
}
$allowModifications = false;
if (is_bool($options)) {
$allowModifications = $options;
} elseif (is_array($options)) {
if (isset($options['allowModifications'])) {
$allowModifications = (bool) $options['allowModifications'];
}
if (isset($options['skipExtends'])) {
$this->_skipExtends = (bool) $options['skipExtends'];
}
}
set_error_handler(array($this, '_loadFileErrorHandler')); // Warnings and errors are suppressed
if (strstr($xml, '<?xml')) {
$config = simplexml_load_string($xml);
} else {
$config = simplexml_load_file($xml);
}
restore_error_handler();
// Check if there was a error while loading file
if ($this->_loadFileErrorStr !== null) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception($this->_loadFileErrorStr);
}
if ($section === null) {
$dataArray = array();
foreach ($config as $sectionName => $sectionData) {
$dataArray[$sectionName] = $this->_processExtends($config, $sectionName);
}
parent::__construct($dataArray, $allowModifications);
} else if (is_array($section)) {
$dataArray = array();
foreach ($section as $sectionName) {
if (!isset($config->$sectionName)) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("Section '$sectionName' cannot be found in $xml");
}
$dataArray = array_merge($this->_processExtends($config, $sectionName), $dataArray);
}
parent::__construct($dataArray, $allowModifications);
} else {
if (!isset($config->$section)) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("Section '$section' cannot be found in $xml");
}
$dataArray = $this->_processExtends($config, $section);
if (!is_array($dataArray)) {
// Section in the XML file contains just one top level string
$dataArray = array($section => $dataArray);
}
parent::__construct($dataArray, $allowModifications);
}
$this->_loadedSection = $section;
}
/**
* Helper function to process each element in the section and handle
* the "extends" inheritance attribute.
*
* @param SimpleXMLElement $element XML Element to process
* @param string $section Section to process
* @param array $config Configuration which was parsed yet
* @throws Zend_Config_Exception When $section cannot be found
* @return array
*/
protected function _processExtends(SimpleXMLElement $element, $section, array $config = array())
{
if (!isset($element->$section)) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("Section '$section' cannot be found");
}
$thisSection = $element->$section;
$nsAttributes = $thisSection->attributes(self::XML_NAMESPACE);
if (isset($thisSection['extends']) || isset($nsAttributes['extends'])) {
$extendedSection = (string) (isset($nsAttributes['extends']) ? $nsAttributes['extends'] : $thisSection['extends']);
$this->_assertValidExtend($section, $extendedSection);
if (!$this->_skipExtends) {
$config = $this->_processExtends($element, $extendedSection, $config);
}
}
$config = $this->_arrayMergeRecursive($config, $this->_toArray($thisSection));
return $config;
}
/**
* Returns a string or an associative and possibly multidimensional array from
* a SimpleXMLElement.
*
* @param SimpleXMLElement $xmlObject Convert a SimpleXMLElement into an array
* @return array|string
*/
protected function _toArray(SimpleXMLElement $xmlObject)
{
$config = array();
$nsAttributes = $xmlObject->attributes(self::XML_NAMESPACE);
// Search for parent node values
if (count($xmlObject->attributes()) > 0) {
foreach ($xmlObject->attributes() as $key => $value) {
if ($key === 'extends') {
continue;
}
$value = (string) $value;
if (array_key_exists($key, $config)) {
if (!is_array($config[$key])) {
$config[$key] = array($config[$key]);
}
$config[$key][] = $value;
} else {
$config[$key] = $value;
}
}
}
// Search for local 'const' nodes and replace them
if (count($xmlObject->children(self::XML_NAMESPACE)) > 0) {
if (count($xmlObject->children()) > 0) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("A node with a 'const' childnode may not have any other children");
}
$dom = dom_import_simplexml($xmlObject);
$namespaceChildNodes = array();
// We have to store them in an array, as replacing nodes will
// confuse the DOMNodeList later
foreach ($dom->childNodes as $node) {
if ($node instanceof DOMElement && $node->namespaceURI === self::XML_NAMESPACE) {
$namespaceChildNodes[] = $node;
}
}
foreach ($namespaceChildNodes as $node) {
switch ($node->localName) {
case 'const':
if (!$node->hasAttributeNS(self::XML_NAMESPACE, 'name')) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("Misssing 'name' attribute in 'const' node");
}
$constantName = $node->getAttributeNS(self::XML_NAMESPACE, 'name');
if (!defined($constantName)) {
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("Constant with name '$constantName' was not defined");
}
$constantValue = constant($constantName);
$dom->replaceChild($dom->ownerDocument->createTextNode($constantValue), $node);
break;
default:
require_once 'Zend/Config/Exception.php';
throw new Zend_Config_Exception("Unknown node with name '$node->localName' found");
}
}
return (string) simplexml_import_dom($dom);
}
// Search for children
if (count($xmlObject->children()) > 0) {
foreach ($xmlObject->children() as $key => $value) {
if (count($value->children()) > 0 || count($value->children(self::XML_NAMESPACE)) > 0) {
$value = $this->_toArray($value);
} else if (count($value->attributes()) > 0) {
$attributes = $value->attributes();
if (isset($attributes['value'])) {
$value = (string) $attributes['value'];
} else {
$value = $this->_toArray($value);
}
} else {
$value = (string) $value;
}
if (array_key_exists($key, $config)) {
if (!is_array($config[$key]) || !array_key_exists(0, $config[$key])) {
$config[$key] = array($config[$key]);
}
$config[$key][] = $value;
} else {
$config[$key] = $value;
}
}
} else if (!isset($xmlObject['extends']) && !isset($nsAttributes['extends']) && (count($config) === 0)) {
// Object has no children nor attributes and doesn't use the extends
// attribute: it's a string
$config = (string) $xmlObject;
}
return $config;
}
/**
* Merge two arrays recursively, overwriting keys of the same name
* in $firstArray with the value in $secondArray.
*
* @param mixed $firstArray First array
* @param mixed $secondArray Second array to merge into first array
* @return array
*/
protected function _arrayMergeRecursive($firstArray, $secondArray)
{
if (is_array($firstArray) && is_array($secondArray)) {
foreach ($secondArray as $key => $value) {
if (isset($firstArray[$key])) {
$firstArray[$key] = $this->_arrayMergeRecursive($firstArray[$key], $value);
} else {
if($key === 0) {
$firstArray= array(0=>$this->_arrayMergeRecursive($firstArray, $value));
} else {
$firstArray[$key] = $value;
}
}
}
} else {
$firstArray = $secondArray;
}
return $firstArray;
}
}
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