สอบถามการเขียน PHP ดึงข้อมูลจาก Database แล้วส่งกลับไปแบบ Json หน่อยครับ

<?php
if(isset($_GET['id']))
{
	$id = $_GET['id'];
	$con = mysql_connect("localhost","root","root");
	mysql_select_db("VeritusBank",$con);
	$s = array();
	$result = mysql_query("SELECT CONCAT(fname,' ',lname) AS name,FORMAT(money,0) money,DATE_FORMAT(date,'%d-%m-%Y %h:%i %p') date FROM username WHERE id='$id'");
	while ($r=mysql_fetch_array($result,MYSQL_NUM))
	{
		$s = array("login"=>array($r['name'],$r['money'],$r['date']));
	}
}
echo json_encode($s);
?>

if(isset($_GET['id']))
{
        $id = $_GET['id'];
        $con = mysql_connect("localhost","root","root");
        mysql_select_db("VeritusBank",$con);
        $s = array();
        $result = mysql_query("SELECT CONCAT(fname,' ',lname) AS name,FORMAT(money,0) money,DATE_FORMAT(date,'%d-%m-%Y %h:%i %p') date FROM username");
        while ($r=mysql_fetch_array($result))
        {
           $s[] = $r;
        }
    $data["login"] = $s;
echo json_encode($data);
}

class test{
     public $login;
}
$ob=new test; $ob->login=$r;
echo json_encode($ob);