I use data from php, grid return empty. I see error in fire bug:

My files:

include(“grid/dbconfig.php”);
//since we want to use a JSON data we should include
//encoder and decoder for JSON notation
//If you use a php >= 5 this file is not needed
include(“grid/JSON.php”);

// create a JSON service
$json = new Services_JSON();

$page = $_GET['page']; // get the requested page
$limit = $_GET['rows']; // get how many rows we want to have into the grid
$sidx = $_GET['sidx']; // get index row – i.e. user click to sort
$sord = $_GET['sord']; // get the direction
if(!$sidx) $sidx =1;
// connect to the database
$db = mysql_connect($dbhost, $dbuser, $dbpassword)
or die(“Connection Error: ” . mysql_error());

mysql_select_db($database) or die(“Error conecting to db.”);
$result = mysql_query(“SELECT COUNT(*) AS count FROM tabela_teste”);
$row = mysql_fetch_array($result,MYSQL_ASSOC);
$count = $row['count'];

if( $count >0 ) {