百度翻译API的PHP代码，测试可以实现，不过英译中可能需要转换编码。

    <?php  
    function language($value,$from="auto",$to="auto")  
    {  
      $value_code=urlencode($value);  
      #首先对要翻译的文字进行 urlencode 处理  
      $appid="你的API Key";  
      #您注册的API Key  
      $languageurl = "http://openapi.baidu.com/public/2.0/bmt/translate?client_id=" . $appid ."&q=" .$value_code. "&from=".$from."&to=".$to;  
      #生成翻译API的URL GET地址  
      $text=json_decode(language_text($languageurl));  
      $text = $text->trans_result;  
      return $text[0]->dst;  
    }  
    function language_text($url)  #获取目标URL所打印的内容  
    {  
      if(!function_exists('file_get_contents')) {  
       $file_contents = file_get_contents($url);  
      } else {  
      $ch = curl_init();  
      $timeout = 5;  
      curl_setopt ($ch, CURLOPT_URL, $url);  
      curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);  
      curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);  
      $file_contents = curl_exec($ch);  
      curl_close($ch);  
      }  
       return $file_contents;  
    }  
      echo language('我爱你');  
    ?>