kxpaser类中的乱码问题，在线等，马上给分，谢谢

[macexperience]

大家好，我是一个php新手。
问题如下：
我最近使用了一个老外写的xml解析类kxpaser，版本是3.2。
在解析xml的时候不能识别中文，出现乱码，kxpaser.php代码如下

[macexperience]

<?php
/*
* KXParse/2.3
* Initially started in March 2002 By Khalid Al-Kary
* Version 2.0 was started in 24 April 2003 by Khalid Al-Kary
* ----------------------------------------------------------
*/

class kxparse {
/*--[ tree mapper ]--*/
var $document;
var $xml;
var $xml_parser;

/*---[tag selection engine]--*/
var $curr_tag;

/*---[tree dumper]---*/
var $dump_pos;
var $dump_temp;

/*----[io handling]--*/
var $file;

/*--------------------------------------------------[the constructor]-----*/
function kxparse($file=false) {
$this->file=$file;
if ($file!=false) {
$flag=$this->init_mapper();
if (!$flag) {
return false;
}
$this->init_tree_dumper();
$this->init_selection_engine();
}
}
/*------------------------------------------[IO handling functions]---------*/
function load($file=false) {
if ($file===false) {
$flag=$this->init_mapper();
return $flag;
}
else {
$this->file=$file;
$flag=$this->init_mapper();
if ($flag) {
$this->init_tree_dumper();
$this->init_selection_engine();
}
return $flag;
}
}
function save($file=false) {
if ($file==false) {
$file=$this->file;
}
if (!$file) {
return false;
}
$this->dump_tree();
$flag=$this->io_put_content($file, $this->dump_temp);
$this->dump_temp="";
if ($flag==false) {
return false;
}
return true;
}
function load_string($str) {
$this->xml=$str;
$this->file=false;
$flag=$this->init_mapper();
$this->init_tree_dumper();
$this->init_selection_engine();
return $flag;
}
function io_put_content($filename, $content) {
$flag=true;
$fd=fopen($filename, "wb");
if ($fd==false) {
$flag=false;
}
else {
$flag=fwrite($fd, $content);
}
fclose($fd);
return $flag;
}
function io_get_content($filename) {
$fd=fopen($filename,"r");
$content="";
if ($fd==false) {
$content=false;
}
else {
while (!feof($fd)) {
$content.=fread($fd,4096);
}
}
fclose($fd);
return $content;
}
function io_gen_filename($prefix) {
$i=0;
$filename="";
while (true) {
if (!file_exists(($i==0) ? $prefix : $prefix.".".$i)) {
$filename=($i==0) ? $prefix : $prefix.".".$i;
break;
}
$i++;
}
return $filename;
}
function get_content($reswap=true) {
$this->dump_tree();
$val=$this->dump_temp;
$this->dump_temp="";
return $val;
}
function get_file_name() {
return $this->file;
}

[macexperience]

/*------------------------------------------[ xml tree mapper (expat-based) ]-*/
function init_mapper() {
$this->document['pi']=array();
$this->document['children']=array(0);
$this->document['internal']=0;
$this->document['length']=0;
$this->curr_tag=&$this->document;
$this->xml_parser=xml_parser_create();
xml_set_object($this->xml_parser,$this);
xml_set_element_handler($this->xml_parser,"start_element_handler","end_element_handler");
xml_set_character_data_handler($this->xml_parser,"cdata_handler");
xml_set_processing_instruction_handler($this->xml_parser,"pi_handler");
xml_parser_set_option($this->xml_parser, XML_OPTION_CASE_FOLDING, 0);
if ($this->file) {
$fd=fopen($this->file,"r");
$content="";
if (!$fd) {
return false;
}
while (!feof($fd)) {
$content=fread($fd,4096);
xml_parse($this->xml_parser,$content);
}
fclose($fd);
}
else {
if ($this->xml=="") {
return false;
}
xml_parse($this->xml_parser,$this->xml);
}
$this->init_selection_engine();
return true;
}
function start_element_handler($parser, $name, $attribs) {
$this->curr_tag['length']++;
if (!isset($this->curr_tag['children']['?'])) {
$this->curr_tag['children']['?']=array(0);
}
if (!isset($this->curr_tag['children'][$name])) {
$this->curr_tag['children'][$name]=array(0);
}
$last_child=count($this->curr_tag['children'][$name]);
$anon_last_child=count($this->curr_tag['children']['?']);
$this->curr_tag['children'][$name][$last_child]=array();
$this->curr_tag['children'][$name][$last_child]['attribs']=$attribs;
$this->curr_tag['children'][$name][$last_child]['children']=array("?" => array(0));
$this->curr_tag['children'][$name][$last_child]['parent']=&$this->curr_tag;
$this->curr_tag['children'][$name][$last_child]['name']=$name;
$this->curr_tag['children'][$name][$last_child]['length']=0;
$this->curr_tag['children'][$name][$last_child]['text']="";
$this->curr_tag['children'][$name][$last_child]['anon_index']=$anon_last_child;
$this->curr_tag['children'][$name][$last_child]['index']=$last_child;
$this->curr_tag['children']['?'][$anon_last_child]=&$this->curr_tag['children'][$name][$last_child];
$this->curr_tag=&$this->curr_tag['children'][$name][$last_child];
}
function end_element_handler($parser, $name) {
$this->curr_tag=&$this->curr_tag['parent'];
}
function cdata_handler($parser, $data) {
$this->curr_tag['text'].=$data;
}
function pi_handler($parser, $target, $data) {
$this->document['pi'][$target]=$data;
}
/*------------------------------------------[tree dumper]-----------------------*/
function init_tree_dumper() {
$this->dump_temp="";
$this->dump_pos=0;
}
function dump_tree() {
$this->init_tree_dumper();
$sec_curr_tag=&$this->curr_tag;
$this->curr_tag=&$this->document;

$karr=array_keys($this->document['pi']);
$ecount=count($karr);

for ($i=0; $i<$ecount; $i++) {
$this->dump_temp.="<?".$karr[$i]." ".$this->htmlencode($this->document['pi'][$karr[$i]], true)."?>";
$this->dump_pos+=strlen($karr[$i])+strlen($this->htmlencode($this->document['pi'][$karr[$i]], true))+5;
}
unset($karr);
unset($ecount);

$this->curr_tag=&$this->document['children']['?'][1];
$this->dump_current_element();
$this->curr_tag=&$sec_curr_tag;
}
function dump_current_element() {
$internal=0;
if ($this->curr_tag['length']>0 || (isset($this->curr_tag['text']) && $this->curr_tag['text']!="")) {
$internal=0;
}
else {
$internal=1;
}
if ($this->dump_pos<strlen($this->dump_temp)) {
if ($internal==0) {
$this->dump_temp=substr_replace($this->dump_temp,"<".$this->curr_tag['name']."></".$this->curr_tag['name'].">",$this->dump_pos,0);
}
else {
$this->dump_temp=substr_replace($this->dump_temp,"<".$this->curr_tag['name']."/>",$this->dump_pos,0);
}
}
else {
if ($internal==0) {
$this->dump_temp.="<".$this->curr_tag['name']."></".$this->curr_tag['name'].">";
}
else {
$this->dump_temp.="<".$this->curr_tag['name']."/>";
}
}
if (count($this->curr_tag['attribs'])>0) {
$this->dump_pos+=strlen($this->curr_tag['name'])+1;
$karr=array_keys($this->curr_tag['attribs']);
$ecount=count($karr);

for ($i=0;$i<$ecount;$i++) {
$this->dump_temp=substr_replace($this->dump_temp," ",$this->dump_pos++,0);
$this->dump_temp=substr_replace($this->dump_temp,$karr[$i]."=\"".$this->htmlencode($this->curr_tag['attribs'][$karr[$i]], true)."\"",$this->dump_pos,0);
$this->dump_pos+=strlen($karr[$i])+strlen($this->htmlencode($this->curr_tag['attribs'][$karr[$i]], true))+3;
}
unset($karr);
unset($ecount);
if ($internal==1) {
$this->dump_pos+=2;
}
}
else {
if ($internal==0) {
$this->dump_pos+=strlen($this->curr_tag['name'])+1;
}
else {
$this->dump_pos+=strlen($this->curr_tag['name'])+3;
}
}
if ($internal==1) {
$this->curr_tag=&$this->curr_tag['parent'];
}
else {
$this->dump_pos+=1;
$this->dump_temp=substr_replace($this->dump_temp,$this->htmlencode($this->curr_tag['text']),$this->dump_pos,0);
$this->dump_pos+=strlen($this->htmlencode($this->curr_tag['text']));
$ecount=count($this->curr_tag['children']['?']);
for ($i=1;$i<$ecount;$i++) {
$this->curr_tag=&$this->curr_tag['children']['?'][$i];
$this->dump_current_tag();
}
unset($ecount);
$this->dump_pos+=3+strlen($this->curr_tag['name']);
$this->curr_tag=&$this->curr_tag['parent'];
}
}

[macexperience]

/*------------------------------------------------[the element selection engine]--*/
function init_selection_engine() {
$this->curr_tag=&$this->document['children']['?'][1];
}
function select($tname,$tindex) {
if ($tname==="") {
return true;
}

$pre_sel=&$this->curr_tag;
$name_arr=$this->explode_collect(":",$tname);
$index_arr=explode(":",$tindex);
$reg_array=array();


if ($name_arr[0]!=="-" && $index_arr[0]!=="-") {
$this->curr_tag=&$this->document;
}
else {
if ($name_arr[0]=="-") {
$name_arr=&array_slice($name_arr,1);
}
if ($index_arr[0]=="-") {
$index_arr=&array_slice($index_arr,1);
}
}

$name_count=count($name_arr);
$index_count=count($index_arr);

if ($name_count!=$index_count) {
$this->curr_tag=&$pre_sel;
return false;
}

for ($i=0;$i<$name_count;$i++) {
if (preg_match("/R\(.{1,}\)/i",$name_arr[$i])===1) {
$patern=substr($name_arr[$i],2,strlen($name_arr[$i])-3);
$count=0;

if (isset($this->curr_tag['children']['regs'][$patern])) {
$reg_arr=&$this->curr_tag['children']['regs'][$patern];
$count=count($reg_arr);
}
else {
$reg_arr=array(0);
$count=1;
$ecount=count($this->curr_tag['children']['?']);

for ($l=1;$l<$ecount;$l++) {
if (preg_match($patern,$this->curr_tag['children']['?'][$l]['name'])===1) {
$reg_arr[$count]=&$this->curr_tag['children']['?'][$l];
$count++;
}
}
$this->curr_tag['children']['regs'][$patern]=&$reg_arr;
$count--;
}
if ($index_arr[$i]==="?") {
return $count;
}
else if ($index_arr[$i]<1) {
$children_count=$count;
$index_arr[$i]=$children_count+$index_arr[$i];

if ($index_arr[$i]<1) {
$this->curr_tag=&$pre_sel;
return false;
}
}
if (isset($reg_arr[$index_arr[$i]])) {
$this->curr_tag=&$reg_arr[$index_arr[$i]];
}
else {
$this->curr_tag=&$pre_sel;
return false;
}
}
else if (strpos($name_arr[$i],"!")===0) {
$val=$this->cselect(substr($name_arr[$i],1),$index_arr[$i]);
if ($index_arr[$i]==="?") {
return $val;
}
else if ($val===false) {
$this->curr_tag=&$pre_sel;
return false;
}
}
else {
if ($index_arr[$i]==="?") {
$returned_count=count($this->curr_tag['children'][$name_arr[$i]]);
return ($returned_count<=0) ? $returned_count : $returned_count-1;
}
else if ($index_arr[$i]<1) {
$children_count=count($this->curr_tag['children'][$name_arr[$i]]);
$index_arr[$i]=$children_count+$index_arr[$i];

if ($index_arr[$i]<1) {
$this->curr_tag=&$pre_sel;
return false;
}
}
if (isset($this->curr_tag['children'][$name_arr[$i]][$index_arr[$i]])) {
$this->curr_tag=&$this->curr_tag['children'][$name_arr[$i]][$index_arr[$i]];
}
else {
$this->curr_tag=&$pre_sel;
return false;
}
}
}
return true;
}