<?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';

$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die ('Error connecting to mysql');
$dbname = 'javascript_test';
mysql_select_db($dbname);

switch ($_POST['action']) {
    case 'getUser':
        $query  = "SELECT name FROM `user`";
        break;
    case 'getTickets':
        $query  = "SELECT * FROM `tickets`";
        break;
    default:
        break;
}
mysql_close($conn);
$result = mysql_query($query);
return json_encode($result);
?>