Ajax data function that should work but doesn't - php

Question

Within my application I have an Ajax function that adds information to a database. Everything worked perfectly until I added in 2 more parameters which was location and username.
It still works with everything else but it doesn't add those last 2 into the database. The names of within the database is location and username. assignedUsername and storeLocation are set else where in the code.
Ajax:
$("#send").click(function(){
$.ajax({
type: 'POST',
contentType: "application/json",
data: orderFood(),
url: rootURL + "/orderFood",
dataType: "json",
success: function(data)
{
alert(assignedUsername);
alert("Data Added");
$.mobile.changePage("#mainMenu");
},
error: function(data)
{
alert(assignedUsername);
alert("Data NOT Added");
$.mobile.changePage("#mainMenu");
}
});
});
function orderFood()
{
alert(storeLocation + ", " + assignedUsername);
return JSON.stringify({
"food1": food1,
"food2": food2,
"food3": food3,
"food4": food4,
"food5": food5,
"food6": food6,
"food7": food7,
"food8": food8,
"food9": food9,
"location": storeLocation,
"username": assignedUsername
});
}
PHP:
$app->post('/orderFood/', 'orderFood');
function orderFood()
{
$request = \Slim\Slim::getInstance()->request();
$q = json_decode($request->getBody());
$sql = "INSERT INTO subsordered(food1, food2, food3, food4, food5, food6, food7, food8, food9, location, username) VALUES (:food1, :food2, :food3, :food4, :food5, :food6, :food7, :food8, :food9, :location, :username)";
try
{
$db = getConnection();
$stmt=$db->prepare($sql);
$stmt->bindParam("food1",$q->food1);
$stmt->bindParam("food2",$q->food2);
$stmt->bindParam("food3",$q->food3);
$stmt->bindParam("food4",$q->food4);
$stmt->bindParam("food5",$q->food5);
$stmt->bindParam("food6",$q->food6);
$stmt->bindParam("food7",$q->food7);
$stmt->bindParam("food8",$q->food8);
$stmt->bindParam("food9",$q->food9);
$stmt->bindParam("location",$q->location);
$stmt->bindParam("username",$q->username);
$stmt->execute();
$db = null;
}
catch(PDOException $e){
echo $e->getMessage();
}
}
I know the PHP is correct though testing with cURL but I thought I'd include it just to get the whole picture
I am extremely stuck with this, from what I can see it SHOULD work but it just doesn't