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【PHP】 XML解析类
作者:Dezai.CN / 发布于2013/10/22/ 520

	<?
	/**
	* +----------------------------------------------------------------------+
	* | SofeeFramework for PHP 4 |
	* +----------------------------------------------------------------------+
	* | Copyright (c) 2004-2005 Sofee Development Team.(http://www.sofee.cn) |
	* +----------------------------------------------------------------------+
	* | This source file is subject to version 1.00 of the Sofee license, |
	* | that is bundled with this package in the file LICENSE, and is |
	* | available through the world-wide-web at the following url: |
	* | http://www.sofee.cn/license/1_00.txt. |
	* | If you did not receive a copy of the Sofee license and are unable to |
	* | obtain it through the world-wide-web, please send a note to |
	* | license@sofee.cn so we can mail you a copy immediately. |
	* +----------------------------------------------------------------------+
	* | Author: Justin Wu <ezdevelop@gmail.com> |
	* +----------------------------------------------------------------------+
	*/

	/**
	* $Id: SofeeXmlParser.php,v 1.3 2005/05/30 06:30:14 wenlong Exp $
	*/

	/**
	* Sofee XML Parser class - This is an XML parser based on PHP's "xml" extension.
	*
	* The SofeeXmlParser class provides a very simple and easily usable toolset to convert XML
	* to an array that can be processed with array iterators.
	*
	* @package SofeeFramework
	* @access public
	* @version $Revision: 1.1 $
	* @author Justin Wu <wenlong@php.net>
	* @homepage http://www.sofee.cn
	* @copyright Copyright (c) 2004-2005 Sofee Development Team.(http://www.sofee.cn)
	* @since 2005-05-30
	* @see PEAR:XML_Parser | SimpleXML extension
	*/
	class SofeeXmlParser
	{
	 /**
	 * XML parser handle
	 *
	 * @var resource
	 * @see xml_parser_create
	 */
	 var $parser;

	 /**
	 * source encoding
	 *
	 * @var string
	 */
	 var $srcenc;

	 /**
	 * target encoding
	 *
	 * @var string
	 */
	 var $dstenc;

	 /**
	 * the original struct
	 *
	 * @access private
	 * @var array
	 */
	 var $_struct = array();

	 /**
	 * Constructor
	 *
	 * @access public
	 * @param mixed $ [$srcenc] source encoding
	 * @param mixed $ [$dstenc] target encoding
	 * @return void
	 * @since
	 */
	 function SofeeXmlParser($srcenc = null, $dstenc = null)
	 {
	 $this->srcenc = $srcenc;
	 $this->dstenc = $dstenc;
	 // initialize the variable.
	 $this->parser = null;
	 $this->_struct = array();
	 }

	 /**
	 * Free the resources
	 *
	 * @access public
	 * @return void
	 */
	 function free()
	 {
	 if (isset($this->parser) && is_resource($this->parser))
	 {
	 xml_parser_free($this->parser);
	 unset($this->parser);
	 }
	 }

	 /**
	 * Parses the XML file
	 *
	 * @access public
	 * @param string $ [$file] the XML file name
	 * @return void
	 * @since
	 */
	 function parseFile($file)
	 {
	 $data = @file_get_contents($file) or die("Can't open file $file for reading!");
	 $this->parseString($data);
	 }

	 /**
	 * Parses a string.
	 *
	 * @access public
	 * @param string $ [$data] XML data
	 * @return void
	 */
	 function parseString($data)
	 {
	 if ($this->srcenc === null)
	 {
	 $this->parser = @xml_parser_create() or die('Unable to create XML parser resource.');
	 }
	 else
	 {
	 $this->parser = @xml_parser_create($this->srcenc) or die('Unable to create XML parser resource with ' . $this->srcenc . ' encoding.');
	 }

	 if ($this->dstenc !== null)
	 {
	 @xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, $this->dstenc) or die('Invalid target encoding');
	 }
	 xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0); // lowercase tags
	 xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1); // skip empty tags
	 if (!xml_parse_into_struct($this->parser, $data, &$this->_struct))
	 {
	 printf("XML error: %s at line %d",
	 xml_error_string(xml_get_error_code($this->parser)),
	 xml_get_current_line_number($this->parser)
	 );
	 $this->free();
	 exit();
	 }

	 $this->_count = count($this->_struct);
	 $this->free();
	 }

	 /**
	 * return the data struction
	 *
	 * @access public
	 * @return array
	 */
	 function getTree()
	 {
	 $i = 0;
	 $tree = array();

	 $tree = $this->addNode($tree,
	 $this->_struct[$i]['tag'],
	 (isset($this->_struct[$i]['value'])) ? $this->_struct[$i]['value'] : '',
	 (isset($this->_struct[$i]['attributes'])) ? $this->_struct[$i]['attributes'] : '',
	 $this->getChild($i)
	 );

	 unset($this->_struct);
	 return ($tree);
	 }

	 /**
	 * recursion the children node data
	 *
	 * @access public
	 * @param integer $ [$i] the last struct index
	 * @return array
	 */
	 function getChild(&$i)
	 {
	 // contain node data
	 $children = array();
	 // loop
	 while (++$i < $this->_count)
	 {
	 // node tag name
	 $tagname = $this->_struct[$i]['tag'];
	 $value = isset($this->_struct[$i]['value']) ? $this->_struct[$i]['value'] : '';
	 $attributes = isset($this->_struct[$i]['attributes']) ? $this->_struct[$i]['attributes'] : '';

	 switch ($this->_struct[$i]['type'])
	 {
	 case 'open':
	 // node has more children
	 $child = $this->getChild($i);
	 // append the children data to the current node
	 $children = $this->addNode($children, $tagname, $value, $attributes, $child);
	 break;
	 case 'complete':
	 // at end of current branch
	 $children = $this->addNode($children, $tagname, $value, $attributes);
	 break;
	 case 'cdata':
	 // node has CDATA after one of it's children
	 $children['value'] .= $value;
	 break;
	 case 'close':
	 // end of node, return collected data
	 return $children;
	 break;
	 }
	 }
	 // return $children;
	 }

	 /**
	 * Appends some values to an array
	 *
	 * @access public
	 * @param array $ [$target]
	 * @param string $ [$key]
	 * @param string $ [$value]
	 * @param array $ [$attributes]
	 * @param array $ [$inner] the children
	 * @return void
	 * @since
	 */
	 function addNode($target, $key, $value = '', $attributes = '', $child = '')
	 {
	 if (!isset($target[$key]['value']) && !isset($target[$key][0]))
	 {
	 if ($child != '')
	 {
	 $target[$key] = $child;
	 }
	 if ($attributes != '')
	 {
	 foreach ($attributes as $k => $v)
	 {
	 $target[$key][$k] = $v;
	 }
	 }

	 $target[$key]['value'] = $value;
	 }
	 else
	 {
	 if (!isset($target[$key][0]))
	 {
	 // is string or other
	 $oldvalue = $target[$key];
	 $target[$key] = array();
	 $target[$key][0] = $oldvalue;
	 $index = 1;
	 }
	 else
	 {
	 // is array
	 $index = count($target[$key]);
	 }

	 if ($child != '')
	 {
	 $target[$key][$index] = $child;
	 }

	 if ($attributes != '')
	 {
	 foreach ($attributes as $k => $v)
	 {
	 $target[$key][$index][$k] = $v;
	 }
	 }
	 $target[$key][$index]['value'] = $value;
	 }
	 return $target;
	 }
	}

	?>

	<?
	// require_once('SofeeXmlParser.php');
	// 实例一 (解析XML文件)：
	$file = 'settings/config.xml';
	$xml = new SofeeXmlParser();
	$xml->parseFile($file);
	$tree = $xml->getTree();
	unset($xml);
	print "<pre>";
	print_r($tree);
	print "</pre>";

	// 实例二 (解析XML字符串)：
	$str = file_get_contents("settings/config.xml");
	$xml = new SofeeXmlParser();
	$xml->parseString($str);
	$tree = $xml->getTree();
	unset($xml);
	print "<pre>";
	print_r($tree);
	print "</pre>";
	?>
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