Generate random id from auto increment

I recommend you take a look at uuids.

https://github.com/ramsey/uuid

You can add a listener for the creating event on the model to generate the uuid.

$user = User::create([
    'things' => 'here'
]);

$random = (str) user->id . str_random(10);

$user->field = $random;

$user->save();

If you're keeping the primary key as an integer and simply want to create a random token when a user is being created, I'd advise Observers. See https://laravel.com/docs/5.4/eloquent#observers

You observer class would have a simple method that is fired after the model is created:

public function creating(User $user)
{
    $user->token = str_random(20);
}

@Robstar i tried to use that in lumen but nothing is happen

@topvillas i get this error saying syntax error, unexpected 'user' (T_STRING)

@hellicious Another alternative to UUIDs would be Hashids.

You can create a Hashid from a primary key, and also reverse it by getting the original ID from a Hashid value.

@hellicious Come on, man. I made an error in the example Try and spot it and sort it out.

remember if you don't want to use an autoincrementing primary key for eloquent models then you gave to tell eloquent by placing this in your model;

public $incrementing = false;