<?php
if ( isset($_POST['username']) && isset($_POST['password']) ) {

$con = mysql_connect("localhost","db_usiswa","password");
if (!$con)
  {
  die('Could not connect : ' . mysql_error());
  }
mysql_select_db("db_siswa", $con);
$sql="select * from tbl_login where username = '" . $_POST['username'] . "' and password = '" . $_POST['password']. "'";
$query=mysql_query($sql);
if($query){
         $arr_sukses = array ('response'=>'SuksesLogin');
         echo json_encode($arr_sukses);
}else {
         $arr_gagal = array ('response'=>'GagalLogin');
         echo json_encode($arr_gagal);
      }
} else{
 echo "No Post Here";
}
?>