Variable Types and Return Types

Have you noticed that Laravel 10 came with a big skeleton rewriting to use PHP types everywhere - for parameters, properties, variables, and method returns. But let's explore what are the possible types and their syntax details.

Let's look at two code samples:

Without types:

class UserService {
 
    public $data;
 
    public function processData($user)
    {
        // ...
    }
}

With types:

use App\Models\User;
 
class UserService {
 
    public array $data;
 
    public function processData(User $user): User
    {
        // ...
    }
}

The second example is more readable, right? If a developer opens the first example for the first time, he would have...