<p style="text-align: left">首先，你需要去有道翻译API官网去申请key：<a rel="nofollow" target="_blank" href="http://fanyi.youdao.com/openapi?path=data-mode"&gt;http://fanyi.youdao.com/openapi?path=data-mode
得到key之后，就可以开始从该API获得查询的数据了（返回json还是XML，看个人喜好，这里我用的是json）
下面我直接把responseMsg方法里，实现翻译的代码给出。如果你第一次接触微信API，不懂这个方法是干什么的，请去点击<a target="_blank" href="//www.jb51.cc/article/87252.htm">PHP微信开发之文本自动回复

//get post data,May be due to the different environments

$postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信发来的XML数据

//extract post data

if(!empty($postStr)){
//解析post来的XML为一个对象$postObj

$postObj = simplexml_load_string($postStr,'SimpleXMLElement',LIBXML_NOCDATA);
$fromUsername = $postObj->FromUserName; //请求消息的用户

$toUsername = $postObj->ToUserName; //"我"（订阅号）的公众号id

$keyword = trim($postObj->Content); //用户发给订阅号的消息内容

$time = time(); //时间戳

$msgtype = 'text'; //消息类型：文本

$textTpl = "

  
  %s
  
  
  ";
if($postObj->MsgType == 'event'){ //如果XML信息里消息类型为event

if($postObj->Event == 'subscribe'){ //如果是订阅事件

$contentStr = "欢迎订阅misaka去年夏天！\n更多精彩内容：http://blog.csdn.net/misakaqunianxiatian";

$resultStr = sprintf($textTpl,$fromUsername,$toUsername,$time,$msgtype,$contentStr);

echo $resultStr;

exit();

}

}
$which = mb_substr($keyword,2,'UTF-8');//获取要返回什么样的信息
if($which== "翻译"){ //如果要进行翻译

$fanyi = $which;

$search = str_replace($fanyi,'',$keyword); //要翻译的关键字
$key = ""; //在有道API申请的key
$keyfrom = ""; //与key对应
$url = 'http://fanyi.youdao.com/openapi.do?keyfrom=' . $keyfrom . '&key=' . $key . '&type=data&doctype=json&version=1.1&q=' . urlencode($search);//<a href="/tag/diaoyong/" target="_blank" class="keywords">调用</a>有道翻译API

$json = file_get_contents($url);//也可以用curl来<a href="/tag/huoqu/" target="_blank" class="keywords">获取</a>
$res = json_decode($json,true);

/**
 * 以下从返回的数据中<a href="/tag/tiqu/" target="_blank" class="keywords">提取</a>翻译结果
 */
$contentStr = '【<a href="/tag/chaxun/" target="_blank" class="keywords">查询</a>】' . $res['query'] . "\n";
$contentStr .= "【翻译】\n" . $res['translation'][0] . "\n";

$str = '';
foreach($res['basic']['explains'] as $v){
 $str .= $v . "\n";
}
$contentStr .= "【基本释义】\n" . $str;


if(isset($res['web'])){

 foreach($res['web'] as $kk=>$vv){
  sort($vv);
  $res['web'][$kk] = $vv; //调节字段顺序
 }

 $str = '';
 foreach($res['web'] as $v){
  foreach($v as $k2=>$v2){
   if($k2 == 0){
    $str .= "【". $v2 ."】\n";
   }else{
    foreach($v2 as $v3){
     $str .= $v3 ."\n";
    }
   }
  }
 }
 $contentStr .= "【网络释义】\n" . $str;     
}

$resultStr = sprintf($textTpl,$contentStr);
echo $resultStr;
exit(); 
}