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找了一个中文转化UNICODE底的函数

<?php
// GB2312 转换为 unicode 的函数  
// Program by sadly (www.phpx.com)

function gb2unicode($gb)
{
  if(!trim($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,9,4);
  $utf="";
  while($gb)
  {
   if (ord(substr($gb,0,1))>127)
    {
    $this=substr($gb,0,2);
    $gb=substr($gb,2,strlen($gb));
    $utf.="&#x".$codetable[hexdec(bin2hex($this))-0x8080].";";
    }
   else
    {
    $gb=substr($gb,1,strlen($gb));
    $utf.=substr($gb,0,1);
    }
   }
  return $utf;
}