Class_PHP tutorial for conversion from Simplified to Traditional Chinese

This is a class packaged in Simplified and Traditional Chinese.
Another two table files are needed:
1. http://www.jerry.com.tw/php/big5.map
2. http://www.jerry.com.tw/php/gb.map
The program is as follows: CCharset.php3

//============= ========================================
// Programmer: Magic Jerry
//
// function Big5_Gb($str) => big5 to GB for string
// function Gb_Big5($str) => GB to Big5 for string
//== ================================================== =
class CCharset {

var $gb_map="gb.map"; //If you want to put it in another path, add the complete path
var $big5_map="big5.map" ; //For example="/home/table/gb.map

var $dep_char = 127;


//------------- -------------------------------------------------- --
function cbig5_gb($str,$fd) {

$c=ord(substr($str,0,1));
$x=ord(substr($str, 1,1));
$address=(($c-160)*510)+($x-1)*2;
fseek($fd, $address);
$hi= fgetc($fd);
$lo=fgetc($fd);
return "$hi$lo";
}

function cgb_big5($str,$fd) {
$c=ord(substr($str,0,1));
$x=ord(substr($str,1,1));
$address=(($c-160) *510)+($x-1)*2;
fseek($fd, $address);
$hi=fgetc($fd);
$lo=fgetc($fd);
return "$hi$lo";
}

//--------------------------- -------------------------------------
function Big5_Gb($str) {
$fd = fopen ($this->gb_map, "r");
$str=str_replace("charset=big5","charset=gb2312", $str);
$outstr="";
for($i=0;$i$ch=ord(substr($str,$i,1));
if($ch > $this->dep_char) {
$outstr.=$this->cbig5_gb(substr($str,$i,2),$fd);
$i++;

} else {
$outstr.=substr($str,$i,1);
}
}
fclose ($fd);
return $outstr;
}
//--------------------------------------------- --------------------
function Gb_Big5($str) {
$fd = fopen ($this->big5_map, "r");
$str=str_replace("charset=gb2312","charset=big5", $str);
$outstr="";
for($i=0;$i$ch=ord(substr($str,$i,1));
if($ch > $this->dep_char) {
$outstr.= $this->cgb_big5(substr($str,$i,2),$fd);
$i++;

} else {
$outstr.=substr($str,$ i,1);
}
}
fclose ($fd);
return $outstr;

}

}
?>

================================================ ======================
Usage example:

// Designer: Magic Jerry


//====How to directly convert text string========
include("CCharset.php3");
$obj=new CCharset;
$big5= "This is a big5 text string";
$tgb=$obj->Big5_Gb($big5);
echo $tgb; //===> $tgb is the converted gb codeword String
$tbig5=$obj->Gb_Big5($tgb);
echo $tbig5; // Returned again: big5
//=========== ===========================
?>




//If you convert web pages or files directly
// Syntax http://your.domain.com.tw/this program.php3?http://Web page url or file to be transcoded
// example: Convert Kimo homepage
// http://your.domain.com.tw/this program.php3?http://www.kimo.com.tw/index.shtml
// Note: If the following writing method encounters a web page that uses cookies, such as authenticating users, it may be kicked back and cause a login error.
// Why? Think about it... @_@
include(" CCharset.php3");
$file=$QUERY_STRING;
$fcontents = join( '', file( "$file" ) );
$fcontents=str_replace("", "", $fcontents);
$code=new CCharset;
$gb=$code->Big5_Gb($fcontents);
echo $ gb;
?>



Example:



if($func=="charset") {
setcookie("CHAR_GB",$GB,time()+ 31536000);
$t=time();
$url="http://".$HTTP_HOST.$PHP_SELF."?". $QUERY_STRING;
$url=str_replace("?func=charset&GB=1","", $url);
$url=str_replace("?func=charset&GB=0","", $url) ;
$url=str_replace("&func=charset&GB=1","", $url);
$url=str_replace("&func=charset&GB=0","", $url);
//echo $url;
//echo "SET to Charset = $CHAR_GB";
$t=time();
echo "

";

exit;
}
//phpinfo();
if($CHAR_GB==1 && !$istran ) {
include("CCharset.php3");
if(strlen($QUERY_STRING)) $url="http://".$HTTP_HOST.$PHP_SELF."?".$QUERY_STRING."&istran=1";
else $url="http://".$HTTP_HOST.$PHP_SELF."?istran=1";

while (list ($key, $val) = each ($HTTP_COOKIE_VARS)) {
//echo "$key => $val
";
$url.="&".$key."=".urlencode($val);
}

$fcontents = join( '', file( "$url" ) );
$code=new CCharset;
$fcontents=$code->Big5_Gb($fcontents);
//echo "轉換過的 $CHAR_GB";
echo $fcontents;
exit;

}
//} else setcookie("CHAR_GB",0,time()+ 31536000);
echo "