PHP怎么实现简体中文转换繁体中文


<?php
/***************************************************************************
*                             big2gb.php
*                           --------------
*   begin                : Friday, Jan 3, 2003
*   author               : CRLin
*   url                  : http://web.dhjh.tcc.edu.tw/~gzqbyr/forum/
*
*   $Id: big2gb.php,v 1.0.0 2006/4/24 14:43:44 Exp $
*
****************************************************************************//***************************************************************************
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/
define("_FILE_DIR" , dirname(__FILE__) );
 class big2gb
{
function chg_utfcode($str,$charset='big5')
{
if ($charset=='big5')
{
$fd = fopen(_FILE_DIR."/gb2big.map",'r');
$str1 = fread($fd,filesize(_FILE_DIR."/gb2big.map"));
}
else 
{
$fd = fopen(_FILE_DIR."/big2gb.map",'r');
$str1 = fread($fd,filesize(_FILE_DIR."/big2gb.map"));
}
fclose($fd);

// convert to unicode and map code
$chg_utf = array();
for ($i=0;$i<strlen($str1);$i=$i+4)
{
$ch1=ord(substr($str1,$i,1))*256;
$ch2=ord(substr($str1,$i+1,1));
$ch1=$ch1+$ch2;
$ch3=ord(substr($str1,$i+2,1))*256;
$ch4=ord(substr($str1,$i+3,1));
$ch3=$ch3+$ch4;
$chg_utf[$ch1]=$ch3;
}

// convert to UTF-8
$outstr='';
for ($k=0;$k<strlen($str);$k++)
{
$ch=ord(substr($str,$k,1));
if ($ch<0x80)
{
$outstr.=substr($str,$k,1);
}
else
{
if ($ch>0xBF && $ch<0xFE)
{
if ($ch<0xE0) {
$i=1;
$uni_code=$ch-0xC0;
} elseif ($ch<0xF0) {
$i=2;
$uni_code=$ch-0xE0;
} elseif ($ch<0xF8) {
$i=3;
$uni_code=$ch-0xF0;
} elseif ($ch<0xFC) {
$i=4;
$uni_code=$ch-0xF8;
} else {
$i=5;
$uni_code=$ch-0xFC;
}
}

$ch1=substr($str,$k,1);
for ($j=0;$j<$i;$j++)
{
$ch1 .= substr($str,$k+$j+1,1);
$ch=ord(substr($str,$k+$j+1,1))-0x80;
$uni_code=$uni_code*64+$ch;
}

if (!$chg_utf[$uni_code])
{
$outstr.=$ch1;
}
else
{
$outstr.=$this->uni2utf($chg_utf[$uni_code]);
}
$k += $i;
}
}
return $outstr;
} // Return utf-8 character
function uni2utf($uni_code)
{
if ($uni_code<0x80) return chr($uni_code);
$i=0;
$outstr='';
while ($uni_code>63) // 2^6=64
{
$outstr=chr($uni_code%64+0x80).$outstr;
$uni_code=floor($uni_code/64);
$i++;
}
switch($i)
{
case 1:
$outstr=chr($uni_code+0xC0).$outstr;break;
case 2:
$outstr=chr($uni_code+0xE0).$outstr;break;
case 3:
$outstr=chr($uni_code+0xF0).$outstr;break;
case 4:
$outstr=chr($uni_code+0xF8).$outstr;break;
case 5:
$outstr=chr($uni_code+0xFC).$outstr;break;
default:
echo "unicode error!!";exit;
}
return $outstr;
}
}?>实例如下：<?php
include "big2gb.php";   $obj=new big2gb;//简体 转换 繁体
$string_big5 = $obj->chg_utfcode($string_gb,'big5');$string_big5 = '你好嗎我愛你hello';
//繁体 转换 简体
$string_gb = $obj->chg_utfcode($string_big5,'gb2312');echo $string_gb;
?>