287 Zeilen
11 KiB
PHP
287 Zeilen
11 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Config
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* @see Zend_Config
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*/
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require_once 'Zend/Config.php';
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/**
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* XML Adapter for Zend_Config
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*
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* @category Zend
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* @package Zend_Config
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Config_Xml extends Zend_Config
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{
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/**
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* XML namespace for ZF-related tags and attributes
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*/
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const XML_NAMESPACE = 'http://framework.zend.com/xml/zend-config-xml/1.0/';
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/**
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* Whether to skip extends or not
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*
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* @var boolean
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*/
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protected $_skipExtends = false;
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/**
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* Loads the section $section from the config file (or string $xml for
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* access facilitated by nested object properties.
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*
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* Sections are defined in the XML as children of the root element.
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*
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* In order to extend another section, a section defines the "extends"
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* attribute having a value of the section name from which the extending
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* section inherits values.
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*
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* Note that the keys in $section will override any keys of the same
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* name in the sections that have been included via "extends".
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*
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* @param string $xml XML file or string to process
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* @param mixed $section Section to process
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* @param boolean $options Whether modifications are allowed at runtime
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* @throws Zend_Config_Exception When xml is not set or cannot be loaded
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* @throws Zend_Config_Exception When section $sectionName cannot be found in $xml
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*/
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public function __construct($xml, $section = null, $options = false)
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{
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if (empty($xml)) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception('Filename is not set');
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}
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$allowModifications = false;
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if (is_bool($options)) {
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$allowModifications = $options;
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} elseif (is_array($options)) {
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if (isset($options['allowModifications'])) {
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$allowModifications = (bool) $options['allowModifications'];
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}
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if (isset($options['skipExtends'])) {
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$this->_skipExtends = (bool) $options['skipExtends'];
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}
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}
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set_error_handler(array($this, '_loadFileErrorHandler')); // Warnings and errors are suppressed
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if (strstr($xml, '<?xml')) {
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$config = simplexml_load_string($xml);
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} else {
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$config = simplexml_load_file($xml);
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}
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restore_error_handler();
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// Check if there was a error while loading file
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if ($this->_loadFileErrorStr !== null) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception($this->_loadFileErrorStr);
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}
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if ($section === null) {
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$dataArray = array();
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foreach ($config as $sectionName => $sectionData) {
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$dataArray[$sectionName] = $this->_processExtends($config, $sectionName);
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}
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parent::__construct($dataArray, $allowModifications);
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} else if (is_array($section)) {
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$dataArray = array();
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foreach ($section as $sectionName) {
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if (!isset($config->$sectionName)) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("Section '$sectionName' cannot be found in $xml");
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}
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$dataArray = array_merge($this->_processExtends($config, $sectionName), $dataArray);
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}
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parent::__construct($dataArray, $allowModifications);
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} else {
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if (!isset($config->$section)) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("Section '$section' cannot be found in $xml");
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}
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$dataArray = $this->_processExtends($config, $section);
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if (!is_array($dataArray)) {
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// Section in the XML file contains just one top level string
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$dataArray = array($section => $dataArray);
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}
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parent::__construct($dataArray, $allowModifications);
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}
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$this->_loadedSection = $section;
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}
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/**
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* Helper function to process each element in the section and handle
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* the "extends" inheritance attribute.
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*
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* @param SimpleXMLElement $element XML Element to process
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* @param string $section Section to process
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* @param array $config Configuration which was parsed yet
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* @throws Zend_Config_Exception When $section cannot be found
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* @return array
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*/
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protected function _processExtends(SimpleXMLElement $element, $section, array $config = array())
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{
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if (!isset($element->$section)) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("Section '$section' cannot be found");
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}
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$thisSection = $element->$section;
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$nsAttributes = $thisSection->attributes(self::XML_NAMESPACE);
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if (isset($thisSection['extends']) || isset($nsAttributes['extends'])) {
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$extendedSection = (string) (isset($nsAttributes['extends']) ? $nsAttributes['extends'] : $thisSection['extends']);
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$this->_assertValidExtend($section, $extendedSection);
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if (!$this->_skipExtends) {
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$config = $this->_processExtends($element, $extendedSection, $config);
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}
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}
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$config = $this->_arrayMergeRecursive($config, $this->_toArray($thisSection));
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return $config;
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}
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/**
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* Returns a string or an associative and possibly multidimensional array from
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* a SimpleXMLElement.
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*
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* @param SimpleXMLElement $xmlObject Convert a SimpleXMLElement into an array
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* @return array|string
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*/
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protected function _toArray(SimpleXMLElement $xmlObject)
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{
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$config = array();
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$nsAttributes = $xmlObject->attributes(self::XML_NAMESPACE);
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// Search for parent node values
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if (count($xmlObject->attributes()) > 0) {
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foreach ($xmlObject->attributes() as $key => $value) {
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if ($key === 'extends') {
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continue;
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}
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$value = (string) $value;
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if (array_key_exists($key, $config)) {
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if (!is_array($config[$key])) {
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$config[$key] = array($config[$key]);
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}
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$config[$key][] = $value;
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} else {
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$config[$key] = $value;
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}
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}
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}
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// Search for local 'const' nodes and replace them
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if (count($xmlObject->children(self::XML_NAMESPACE)) > 0) {
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if (count($xmlObject->children()) > 0) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("A node with a 'const' childnode may not have any other children");
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}
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$dom = dom_import_simplexml($xmlObject);
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$namespaceChildNodes = array();
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// We have to store them in an array, as replacing nodes will
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// confuse the DOMNodeList later
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foreach ($dom->childNodes as $node) {
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if ($node instanceof DOMElement && $node->namespaceURI === self::XML_NAMESPACE) {
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$namespaceChildNodes[] = $node;
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}
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}
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foreach ($namespaceChildNodes as $node) {
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switch ($node->localName) {
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case 'const':
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if (!$node->hasAttributeNS(self::XML_NAMESPACE, 'name')) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("Misssing 'name' attribute in 'const' node");
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}
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$constantName = $node->getAttributeNS(self::XML_NAMESPACE, 'name');
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if (!defined($constantName)) {
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("Constant with name '$constantName' was not defined");
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}
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$constantValue = constant($constantName);
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$dom->replaceChild($dom->ownerDocument->createTextNode($constantValue), $node);
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break;
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default:
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require_once 'Zend/Config/Exception.php';
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throw new Zend_Config_Exception("Unknown node with name '$node->localName' found");
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}
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}
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return (string) simplexml_import_dom($dom);
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}
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// Search for children
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if (count($xmlObject->children()) > 0) {
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foreach ($xmlObject->children() as $key => $value) {
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if (count($value->children()) > 0 || count($value->children(self::XML_NAMESPACE)) > 0) {
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$value = $this->_toArray($value);
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} else if (count($value->attributes()) > 0) {
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$attributes = $value->attributes();
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if (isset($attributes['value'])) {
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$value = (string) $attributes['value'];
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} else {
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$value = $this->_toArray($value);
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}
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} else {
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$value = (string) $value;
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}
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if (array_key_exists($key, $config)) {
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if (!is_array($config[$key]) || !array_key_exists(0, $config[$key])) {
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$config[$key] = array($config[$key]);
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}
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$config[$key][] = $value;
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} else {
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$config[$key] = $value;
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}
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}
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} else if (!isset($xmlObject['extends']) && !isset($nsAttributes['extends']) && (count($config) === 0)) {
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// Object has no children nor attributes and doesn't use the extends
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// attribute: it's a string
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$config = (string) $xmlObject;
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}
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return $config;
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}
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}
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