如何根据mysql修改修改webservice

Question

我将此代码编写为一个Web服务，它返回json数组可以是一个Android应用程序。

如果在运行应用程序期间MySQL数据库中有添加内容，应用程序如何解析所有数据。

<?php
ini_set('default_charset','UTF-8');
$servername = "localhost";
$username = "root";
$password = "passw";
$dbname = "db";
$conn = mysql_connect($servername, $username, $password,$dbname);

    //fetch table rows from mysql db
    $sql = "select * from t_name where  id=1";
    $result = mysql_query("SELECT ID from db.t_name where  id =1" )           
     or die("Error in Selecting " . mysqli_error($connection));

    //create an array
    $emparray[] = array();
    while($row =mysql_fetch_assoc($result))
    {
        $emparray[] = $row;
    }
    echo json_encode($emparray);

    //close the db connection
    mysql_close($conn);
?>