這是以class包裝好的簡繁體轉換的class, 
另外需要兩個table檔: 
1.  
2.  
程式如下: CCharset.php3 
<? //===================================================== 
// 程式員: Magic Jerry 
// 
// function Big5_Gb($str) => big5轉GB for string 
// function Gb_Big5($str) => GB轉Big5 for string 
//===================================================== 
class CCharset { 
var $gb_map="gb.map"; //如果要放到別的路徑,要加上完整路徑 
var $big5_map="big5.map"; //例如 ="/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;$i<strlen($str);$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;$i<strlen($str);$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; 
} 
} 
?> 
=================================================================== 
使用範例: 
<? 
// Designer: Magic Jerry 
//====直接轉換文字串 的使用方法======== 
include("CCharset.php3"); 
$obj=new CCharset; 
$big5="這是一個big5的文字串"; 
$tgb=$obj->Big5_Gb($big5); 
echo $tgb; //===> $tgb為轉換好的gb碼字串 
$tbig5=$obj->Gb_Big5($tgb); 
echo $tbig5; // 又被轉回來了: big5 
//====================================== 
?> 
<? 
//如果直接轉換網頁 或是檔案 
// 語法 這個程式.php3?要轉碼的網頁url或檔案 
// example: 轉換奇摩首頁 
// 這個程式.php3? 
// 注意: 以下寫法如遇到該網頁有使用cookie,例如認證user,可能會被踢回,login錯誤.. 
// 為什麼? 想想看吧... @_@ 
include("CCharset.php3"); 
$file=$QUERY_STRING; 
$fcontents = join( '', file( "$file" ) ); 
$fcontents=str_replace("<head>","<head><base href=https://www.jb51.net/$file>", $fcontents); 
$code=new CCharset; 
$gb=$code->Big5_Gb($fcontents); 
echo $gb; 
?> 
範例: 
<? 
if($func=="charset") { 
setcookie("CHAR_GB",$GB,time()+ 31536000); 
$t=time(); 
$url="".$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"; 
$t=time(); 
echo " 
<script language=javascript> 
document.location='$url' 
</script> 
"; 
exit; 
} 
//phpinfo(); 
if($CHAR_GB==1 && !$istran ) { 
include("CCharset.php3"); 
if(strlen($QUERY_STRING)) $url="".$HTTP_HOST.$PHP_SELF."?".$QUERY_STRING."&istran=1"; 
else $url="".$HTTP_HOST.$PHP_SELF."?istran=1"; 
while (list ($key, $val) = each ($HTTP_COOKIE_VARS)) { 
//echo "$key => $val<br>"; 
$url.="&".$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 " 
<meta http-equiv='Content-Type' content='text/html; charset=big5'>  
<style type="text/css"> 
//<!-- 
.menufont {FONT-FAMILY: 新細明體; FONT-SIZE: 9pt; LETTER-SPACING: 1pt; TEXT-DECORATION: none ; color: balck} 
.frame_font {FONT-FAMILY: 新細明體; FONT-SIZE: 9pt; LETTER-SPACING: 1pt; TEXT-DECORATION: none ; color: yellow} 
.tablefont {FONT-FAMILY: 新細明體; FONT-SIZE: 9pt; LETTER-SPACING: 1pt; TEXT-DECORATION: none ; color: .bodycolor {FONT-FAMILY: 新細明體; FONT-SIZE: 9pt; LETTER-SPACING: 1pt; TEXT-DECORATION: none ; color: .num {FONT-FAMILY: Arial; font-weight:bold ; font-style: normal; FONT-SIZE: 8pt; LETTER-SPACING: 1pt; TEXT-DECORATION: none ; color:a { color: green ; TEXT-DECORATION: none } 
a:hover { color: red ; } 
//--> 
</style> 
"; 
echo 
"<SCRIPT language=JavaScript> 
<!-- 
if (document.images) { 
img4on = new Image(); 
img4on.src="page_img/logo_2.gif"; 
img4off = new Image(); 
img4off.src="page_img/logo.gif"; 
} 
function imgOn(imgName) { 
if (document.images) { 
document[imgName].src = eval(imgName + "on.src"); }} 
function imgOff(imgName) { 
if (document.images) { 
document[imgName].src = eval(imgName + "off.src"); }} 
//--> 
</SCRIPT>"; 
echo "<body leftMargin=0 rightMargin=0 topMargin=0 marginwidth='0' marginheight='0'>"; 
include("hows.php3"); 
echo "<TABLE border=0 width=100% cellPadding=0 cellSpacing=0 >"; 
echo "<TR>"; 
echo "<TD bgcolor=' 
echo "<a href=https://www.jerry.com.tw/ >"; 
echo "<img src='https://www.jb51.net/page_img/left_logo.gif' border=0 alt='Welcome to '>"; 
echo "</a>"; 
echo "</TD>"; 
echo "<TD bgcolor='echo "<TABLE border=0 width=100% cellPadding=0 cellSpacing=0>"; 
echo "<tr>"; 
echo "<td width=200>"; 
echo "<TABLE border=0 width=100% cellPadding=0 cellSpacing=0 >"; 
echo "<tr><td>"; 
echo "<a href=https://www.jb51.net/index.php3 "; 
echo "onmouseout="imgOff('img4')" "; 
echo "onmouseover="imgOn('img4')" "; 
echo ">"; 
echo "<IMG name=img4 SRC=https://www.jb51.net/page_img/logo.gif valign=top border=0>"; 
echo "</a>"; 
echo "</td></tr>"; 
echo "<tr><td>"; 
include("hows_2.php3"); 
echo "</td></tr>"; 
echo "</table>"; 
echo "</td>"; 
echo "<td valign=bottom>"; 
echo "<TABLE border=0 width=90% cellPadding=0 cellSpacing=0>"; 
$tb=" width=20% height=18 align=left "; 
$fnt="&sz=18&cr=231&cg=255&cb=123&br=102&bg=153&bb=153&sh=1"; 
echo "<tr>"; 
echo "<td width=20% $tb>"; 
echo "<a href=https://www.jb51.net/nbbs.php3?proc=area&aid=3>"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=PHP/Zend$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/nbbs.php3?proc=area&aid=9 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=MySQL$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/nbbs.php3?proc=area&aid=4 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=Linux$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/nbbs.php3?proc=area&aid=10 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=範例程式$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
if(strlen($QUERY_STRING)) $aurl="".$HTTP_HOST.$PHP_SELF."?".$QUERY_STRING; 
else $aurl="".$HTTP_HOST.$PHP_SELF; 
$aurl=str_replace("?CHAR_GB=1","", $aurl); 
$aurl=str_replace("?CHAR_GB=0","", $aurl); 
$aurl=str_replace("&CHAR_GB=1","", $aurl); 
$aurl=str_replace("&CHAR_GB=0","", $aurl); 
if(isset($CHAR_GB) && $CHAR_GB==1) { 
if(strlen($QUERY_STRING)) 
echo "<a href=https://www.jb51.net/$aurl&func=charset&GB=0>"; 
else echo "<a href=https://www.jb51.net/$aurl?func=charset&GB=0>"; 
echo "<img border=0 src=https://www.jb51.net/big5.gif>"; 
echo "</a>"; 
} else { 
if(strlen($QUERY_STRING)) 
echo "<a href=https://www.jb51.net/$aurl&func=charset&GB=1>"; 
else echo "<a href=https://www.jb51.net/$aurl?func=charset&GB=1>"; 
echo "<img border=0 src=https://www.jb51.net/gb.gif>"; 
echo "</a>"; 
} 
echo "</td>"; 
echo "</tr>"; 
echo "<tr>"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/php_url.php3 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=相關站台$fnt>"; 
echo "</a>";; 
echo "</td >"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/php_news.php3 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=相關報導$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/singin.php3 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=簽名留念$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
echo "<a href=https://www.jb51.net/index.php3 >"; 
echo "<img border=0 src=https://www.jb51.net/font.php3?str=回首頁$fnt>"; 
echo "</a>"; 
echo "</td>"; 
echo "<td $tb>"; 
echo "注意:切換鈕請勿連續按"; 
echo "</td>"; 
echo "</tr>"; 
echo "</table>"; 
echo "</td>"; 
echo "</tr>"; 
echo "</table>"; 
echo "</TD>"; 
echo "</TR>"; 
echo "<TR >"; 
echo "<TD valign=top>"; 
echo "<IMG SRC=https://www.jb51.net/page_img/curve1.gif >"; 
echo "</TD>"; 
echo "</TR>"; 
echo "<TR>"; 
echo "<TD>"; 
?> 
