<?php

/*
  [UCenter] (C)2001-2099 Comsenz Inc.
  This is NOT a freeware, use is subject to license terms

  $Id: xml.class.php 1059 2011-03-01 07:25:09Z monkey $
 */

function xml_unserialize(&$xml, $isnormal = FALSE)
{
    $xml_parser = new XML($isnormal);
    $data = $xml_parser->parse($xml);
    $xml_parser->destruct();
    return $data;
}

function xml_serialize($arr, $htmlon = FALSE, $isnormal = FALSE, $level = 1)
{
    $s = $level == 1 ? "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\r\n<root>\r\n" : '';
    $space = str_repeat("\t", $level);
    foreach ($arr as $k => $v)
    {
        if (!is_array($v))
        {
            $s .= $space . "<item id=\"$k\">" . ($htmlon ? '<![CDATA[' : '') . $v . ($htmlon ? ']]>' : '') . "</item>\r\n";
        }
        else
        {
            $s .= $space . "<item id=\"$k\">\r\n" . xml_serialize($v, $htmlon, $isnormal, $level + 1) . $space . "</item>\r\n";
        }
    }
    $s = preg_replace("/([\x01-\x08\x0b-\x0c\x0e-\x1f])+/", ' ', $s);
    return $level == 1 ? $s . "</root>" : $s;
}

class XML
{

    var $parser;
    var $document;
    var $stack;
    var $data;
    var $last_opened_tag;
    var $isnormal;
    var $attrs = array();
    var $failed = FALSE;

    function __construct($isnormal)
    {
        $this->XML($isnormal);
    }

    function XML($isnormal)
    {
        $this->isnormal = $isnormal;
        $this->parser = xml_parser_create('ISO-8859-1');
        xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, false);
        xml_set_object($this->parser, $this);
        xml_set_element_handler($this->parser, 'open', 'close');
        xml_set_character_data_handler($this->parser, 'data');
    }

    function destruct()
    {
        xml_parser_free($this->parser);
    }

    function parse(&$data)
    {
        $this->document = array();
        $this->stack = array();
        return xml_parse($this->parser, $data, true) && !$this->failed ? $this->document : '';
    }

    function open(&$parser, $tag, $attributes)
    {
        $this->data = '';
        $this->failed = FALSE;
        if (!$this->isnormal)
        {
            if (isset($attributes['id']) && !is_string($this->document[$attributes['id']]))
            {
                $this->document = &$this->document[$attributes['id']];
            }
            else
            {
                $this->failed = TRUE;
            }
        }
        else
        {
            if (!isset($this->document[$tag]) || !is_string($this->document[$tag]))
            {
                $this->document = &$this->document[$tag];
            }
            else
            {
                $this->failed = TRUE;
            }
        }
        $this->stack[] = &$this->document;
        $this->last_opened_tag = $tag;
        $this->attrs = $attributes;
    }

    function data(&$parser, $data)
    {
        if ($this->last_opened_tag != NULL)
        {
            $this->data .= $data;
        }
    }

    function close(&$parser, $tag)
    {
        if ($this->last_opened_tag == $tag)
        {
            $this->document = $this->data;
            $this->last_opened_tag = NULL;
        }
        array_pop($this->stack);
        if ($this->stack)
        {
            $this->document = &$this->stack[count($this->stack) - 1];
        }
    }

}
