Laravel how to ignore empty parameter numbers - php

Question

I am making a laravel application, Here i can 'filter' out my 'files' first by role (assigned to the user), Folder and then subfolders. for the query i use a for loop, but this can return different values depending on the 'filters' i use.
Now laravel returns this error message:
SQLSTATE[HY093]: Invalid parameter number
Query:
select * from `file` where `id` in (8, 12, 13, ?, ?, ?)
Now i want to ignore those '?' and keep it from returning an error, i know this is doable by making the '?' NULL. but i cant find a way to do that
the code:
public function show($id)
{
$user = Auth::user();
$userid = $user->id;
$role_id = $user->role_id;
$folders = Folder::all();
$file_role = File_Role::where('role_id', '=', $role_id)->pluck('file_id');
// dd($file_role[1]);
$count = count($file_role);
$i = 0;
var_dump($file_role);
for($i = 0; $i < $count; $i++) {
$file[] = File_Subfolder::where('subfolder_id', '=', $id)->where('file_id', '=', $file_role[$i])->pluck('file_id');
}
$chosenfile = File::whereIn('id', $file)->get();
return view('partner.subquents.sub_file', compact('chosenfile'));
}
$file returns 8,12,13,?,?,? in this case. this can change depending on the filters
i tried an foreach loop.and i tried to find on the internet how to assign NULL to '?' values
as you can see in my DD that some dont give data back, but some do

Answer 1

Can u try this:
$fileSubFolderCount = File_Subfolder::where('subfolder_id', '=', $id)->where('file_id', '=', $file_role[$i])->pluck('file_id')->count();
$file[] = $fileSubFolderCount > 0 ? File_Subfolder::where('subfolder_id', '=', $id)->where('file_id', '=', $file_role[$i])->pluck('file_id') : null;