大家好:
想請教，
我寫了一個APP連MYSQL
在本機測試都是OK的

我現在把我的PHP的API放到nas上
也有把我APP的連線網址改了
但他就是都無法登入
不知問題出在哪裡(是不是要開什麼port才可行之類的?
請高手們幫忙解答
謝謝
php 部分

<?php
require_once("db.php");
$emp_id=$_POST['emp_id'];
	$pwd=$_POST['pwd'];
	  $sql = "select* from emp where emp_id='$emp_id' and pwd= '$pwd'";
$q=mysqli_query($db, $sql);
while($e=mysql_fetch_assoc($q))
$output[]=$e;
print(json_encode($output));
mysql_close();
?>

android部分

public class db {
    public static String executeQuery(String emp_id,String passwd) {
        String result = "";
       
        try { 
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("http://192.168.1.2/tt/cont.php");
            ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("emp_id", emp_id));
            params.add(new BasicNameValuePair("pwd", passwd));
            httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
            HttpResponse httpResponse = httpClient.execute(httpPost);
           HttpEntity httpEntity = httpResponse.getEntity();
            InputStream inputStream = httpEntity.getContent();
            BufferedReader bufReader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"), 8);
            StringBuilder builder = new StringBuilder();
            String line = null;
            while((line = bufReader.readLine()) != null) {
                builder.append(line + "\n");
            }
            inputStream.close();
            result = builder.toString();
        } catch(Exception e) { 
        }
        return result;
    }
}