<?php

$host = "localhost";

$user = "root";

$pass = "adsasd";

$database = "mysql";

$linkID = mysql_connect($host, $user, $pass) or die("Could not connect to host.");

mysql_select_db($database, $linkID) or die("Could not find database.");

$query = "SELECT * FROM demo";
$resultID = mysql_query($query, $linkID) or die("Data not found.");

$dati = mysql_num_rows($resultID);

if($dati == 0){

        $json_data = array ('status'=>'KO', 'error'=>'not found');

        echo json_encode($json_data);
}
else{

        $row = mysql_fetch_assoc($resultID);

        $json_data = array ('status'=>'OK', 'data'=>array(

        'id'=>$row['idDemo'],'nome'=>$row['nome'],'descrizione'=>$row['descrizione'],'linkApk'=>$row['linkApk']));

        echo json_encode($json_data);

}

?>