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

利用javascript来转换

<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 <seasonx@163.net>
 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 onclick="modi_str()" value=" 确 定 ">
  <input type=reset value=" 清 空 ">
  <input type=button onclick="document.all.text.method.checked?document.all.text.encode.select():document.all.text.decode.select()" value=" 全 选 ">
</form>

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