测试成功,gb2312.txt下载  
http://www.phpx.com/download/utf8/gb2312.txt  
 
function  gb2utf8($gb)  
{  
           if(!trim($gb))return  $gb;  
           $filename="gb2312.txt";  
           $tmp=file($filename);  
           $codetable=array();  
           while(list($key,$value)=each($tmp))  
                       $codetable[hexdec(substr($value,0,6))]=substr($value,7,6);  
             
           $utf8="";  
           while($gb)  
           {  
                       if  (ord(substr($gb,0,1))>127)  
                       {  
                                   $this=substr($gb,0,2);  
                                   $gb=substr($gb,2,strlen($gb));  
                                   $utf8.="&#x".dechex(hexdec($codetable[hexdec(bin2hex($this))-0x8080])).";";  
                       }  
                       else  
                       {  
                                   $utf8.="&#x".dechex(ord(substr($gb,0,1))).";";  
                                   $gb=substr($gb,1,strlen($gb));  
                       }  
           }  
             
           return  $utf8;  
}  
 
 
echo  gb2utf8("中文Abc");  
 

解决方案 »

  1.   

    呵呵,刚才那程序有点问题看这个程序需要的GB2312.txt文件http://www.phpx.com/download/utf8/gb2312.txt  
    <?//Program writen by sadly www.phpx.comfunction gb2utf8($gb)
    {
    if(!trim($gb))
    return $gb;
    $filename="gb2312.txt";
    $tmp=file($filename);
    $codetable=array();
    while(list($key,$value)=each($tmp))
    $codetable[hexdec(substr($value,0,6))]=substr($value,7,6);$utf8="";
    while($gb)
    {
    if (ord(substr($gb,0,1))>127)
    {
    $this=substr($gb,0,2);
    $gb=substr($gb,2,strlen($gb));
    $utf8.=u2utf8(hexdec($codetable[hexdec(bin2hex($this))-0x8080]));
    }
    else
    {
    $gb=substr($gb,1,strlen($gb));
    $utf8.=u2utf8(substr($gb,0,1));
    }
    }$ret="";
    for($i=0;$i<strlen($utf8);$i+=3)
    $ret.=chr(substr($utf8,$i,3));return $ret;
    }function u2utf8($c)
    {
    for($i=0;$i<count($c);$i++)
    $str="";
    if ($c < 0x80) {
    $str.=$c;
    }
    else if ($c < 0x800) {
    $str.=(0xC0 | $c>>6);
    $str.=(0x80 | $c & 0x3F);
    }
    else if ($c < 0x10000) {
    $str.=(0xE0 | $c>>12);
    $str.=(0x80 | $c>>6 & 0x3F);
    $str.=(0x80 | $c & 0x3F);
    }
    else if ($c < 0x200000) {
    $str.=(0xF0 | $c>>18);
    $str.=(0x80 | $c>>12 & 0x3F);
    $str.=(0x80 | $c>>6 & 0x3F);
    $str.=(0x80 | $c & 0x3F);
    }
    return $str;
    }
    $str = gb2utf8("我们");print"$str";
    ?>
    输出的结果是鎴戜滑
    你把ie的 查看--编码,设成unicode,就可以看见“我们”了