syntax error, unexpected 'if' (T_IF), expecting ']' [duplicate]

I'm working with Laravel 5.8 to develop my project and I have added an if..else conditional statements goes like this, to my Controller:

DB::table('order_detail')->insert([
    "ort_ord_id" => $orderId,
    "ort_amount" => $value->price,
    "ort_total" => $value->discounted * $value->quantity,
    "ort_discount" => ($value->price * $value->quantity) - $value->discounted * $value->quantity,
    "ort_type" => "product",
    "ort_number" => $value->quantity,
    "ort_reference_id" => $value->id,
    if((($request->city)=="98")&&($cartPrice >=0)&&($request->province)=="8")){
    "ort_free_delivery" => 'City Free Delivery'
    }elseif((($request->city)!="98")&&($cartPrice >=0)&&($request->province)!="8")){
        "ort_free_delivery" => 'Country Free Delivery'
    }else{
        "ort_free_delivery" => '',
    }
    "created_at" => now(),
    "updated_at" => now()
]);

But when I run this, I get this error:

syntax error, unexpected 'if' (T_IF), expecting ']'

Which is referring to this line:

if((($request->city)=="98")&&($cartPrice >=0)&&($request->province)=="8")){

So what is going wrong here? How can I solve this issue?

I would really appreciate any idea or suggestion from you guys...

Thanks in advance.