<?php
$str = "TTL全天候自动聚焦";
$str = preg_replace("|&#([0-9]{1,5});|", "\".u2utf82gb(\\1).\"", $str);
$str = "\$str=\"$str\";";

eval($str);
echo $str;

function u2utf82gb($c){
    $str="";
    if ($c < 0x80) {
         $str.=$c;
    } else if ($c < 0x800) {
         $str.=chr(0xC0 | $c>>6);
         $str.=chr(0x80 | $c & 0x3F);
    } else if ($c < 0x10000) {
         $str.=chr(0xE0 | $c>>12);
         $str.=chr(0x80 | $c>>6 & 0x3F);
         $str.=chr(0x80 | $c & 0x3F);
    } else if ($c < 0x200000) {
         $str.=chr(0xF0 | $c>>18);
         $str.=chr(0x80 | $c>>12 & 0x3F);
         $str.=chr(0x80 | $c>>6 & 0x3F);
         $str.=chr(0x80 | $c & 0x3F);
    }
    return iconv('UTF-8', 'GB2312', $str);
}
?>

function unescape($str) {
  $str = rawurldecode($str);
  preg_match_all("/(?:%u.{4})|&#x.{4};|&#\d+;|.+/U",$str,$r);
  $ar = $r[0];
print_r($ar);
  foreach($ar as $k=>$v) {
    if(substr($v,0,2) == "%u")
      $ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,-4)));
    elseif(substr($v,0,3) == "&#x")
      $ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,3,-1)));
    elseif(substr($v,0,2) == "&#") {
echo substr($v,2,-1)."<br>";
      $ar[$k] = iconv("UCS-2","GB2312",pack("n",substr($v,2,-1)));
    }
  }
  return join("",$ar);
}

$str = "TTL全天候自动聚焦";
echo unescape($str); //out TTL全天候自动聚焦

<style>
BODY {
 FONT-SIZE: 9pt; PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px;
}
input {
 FONT-SIZE: 9pt; height: 13pt;
}
</style>

<script language="JavaScript1.2">
/*
 This following code are designed and writen by Windy_sk <[email protected]>
 You can use it freely, but u must held all the copyright items!
*/

function Str2Unicode(str){
 var arr = new Array();
 for(var i=0;i<str.length;i++){
  arr[i]="&#" + str.charCodeAt(i) + ";";
 }
 return(arr.toString().replace(/,/g,""));
}

function Unicode2oStr(str){
 var re=/&#[\da-fA-F]{1,5};/ig;
 var arr=str.match(re);
 if(arr==null)return("");
 for(var i=0;i<arr.length;i++){
  arr[i]=String.fromCharCode(arr[i].replace(/[&#;]/g,""));
 }
 return(arr.toString().replace(/,/g,""))
}

function modi_str(){
 if(document.all.text.method.checked){
  if(document.all.text.decode.value!=""){
   document.all.text.encode.value = Str2Unicode(document.all.text.decode.value);
  }else{
   document.all.text.decode.value = Unicode2oStr(document.all.text.encode.value);
  }
 }else{
  if(document.all.text.encode.value!=""){
   document.all.text.decode.value = Unicode2oStr(document.all.text.encode.value);
  }else{
   document.all.text.encode.value = Str2Unicode(document.all.text.decode.value);
  }
 }
}
</script>
<title>Unicode</title>
<form name=text>
文本原型：<br>
  <textarea name="decode" cols="100" rows="10"></textarea>
  <br>
转换代码：<br>
  <textarea name="encode" cols="100" rows="10"></textarea>
  <br>
  <input type="checkbox" name="method" checked> 正向转换
  <input type=button value=" 确 定 ">
  <input type=reset value=" 清 空 ">
  <input type=button value=" 全 选 ">
</form>

<?
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)-2);
          $utf8.=u2utf8(hexdec($codetable[hexdec(bin2hex($this))-0x8080]));
        }else{
            $this=substr($gb,0,1);
            $gb=substr($gb,1,strlen($gb)-1);
            $utf8.=u2utf8($this);
        }
    }
    return $utf8;
}

function u2utf8($c){
    $str="";
    if ($c < 0x80) {
         $str.=$c;
    } else if ($c < 0x800) {
         $str.=chr(0xC0 | $c>>6);
         $str.=chr(0x80 | $c & 0x3F);
    } else if ($c < 0x10000) {
         $str.=chr(0xE0 | $c>>12);
         $str.=chr(0x80 | $c>>6 & 0x3F);
         $str.=chr(0x80 | $c & 0x3F);
    } else if ($c < 0x200000) {
         $str.=chr(0xF0 | $c>>18);
         $str.=chr(0x80 | $c>>12 & 0x3F);
         $str.=chr(0x80 | $c>>6 & 0x3F);
         $str.=chr(0x80 | $c & 0x3F);
    }
    return $str;
}

?>