How to generate unique random value for each user in laravel and add it to database

Question

I am developing a event organization website. Here when the user registers for an event he will be given a unique random number(10 digit), which we use to generate a barcode

Answer 1

One Solution could be like this:

use Illuminate\Support\Facades\Validator;
private function genUserCode(){
    $this->user_code = [
        'user_code' => mt_rand(1000000000,9999999999)
    ];

    $rules = ['user_code' => 'unique:users'];

    $validate = Validator::make($this->user_code, $rules)->passes();

    return $validate ? $this->user_code['user_code'] : $this->genUserCode();
}

Its generating a random number between 1000000000 and 9999999999. After that, it validates the number against the table. If true then it returns the number, otherwise runs the function again.