PHP CODE:
      <?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
$menu= htmlspecialchars($_GET["menu"]);

$sql = "select name,menu,price,picture,description from items where menu='$menu' order by menu asc";

$result = $conn->query($sql);
$arr=array();
if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
       array_push($arr, $row);
    }
    echo json_encode($arr);
} else {
    echo "0 results";
}
$conn->close();
?>

Output:
 [{"name":"XXXXX","menu":"YYYYY","price":"311.55","picture":"https://www.google.com/test/item/test.jpg","description":"Test Message"}]

Expected Output:
{
   "data":[
      {
"name":"XXXXX",
"menu":"YYYYY",
"price":"311.55",
"picture":"https://www.google.com/test/item/test.jpg",
"description":"Test Message"
}
]
}