foreach data to array laravel - php

Question

I get the problem when I try looping the data to store in variable for making the pie chart on Laravel
this is my code in controller
// $countUser = DB::select(DB::raw("
// SELECT r.name AS name, count(u.id) AS countUser
// FROM users u, role_user ru, roles r
// WHERE u.id = ru.user_id
// AND ru.role_id = r.id
// GROUP BY name "));
$countUser = DB::table(DB::raw('users'))
->select(DB::raw('roles.name AS name, count(users.id) AS countUser'))
->join('role_user', 'users.id', '=', 'role_user.user_id')
->join('roles', 'role_user.role_id', '=', 'roles.id')
->groupByRaw('role_user.role_id, name')->get();
$data = " ";
foreach($countUser as $user){
$data = "['".$user->name."', ".$user->countUser."],";
}
dd($data);
I expect the result like this
but, I get the result only one
When I try this dd($countUser);. This is the result
How to fix it?

Answer 1

In your example you keep overwriting $data, instead lets use Laravel Collection methods to help you.
Map all your entries to the format [$name, $count]. Then use the Collection method implode(), to join the strings with a comma.
$concatenatedUsers = $countUser->map(function ($user) {
return '[' . $user->name . ', ' . $user->countUser ']';
})->implode(', ');
dd($concatenatedUsers);