Use random var in behat tests to produce unique usernames

Right now I am creating users using something like the following

Given users:
| name | status | roles |
| kyle | 1 | authenticated user |
| cartman | 1 | admin |

Is there a possibility to add random strings in these names?

If I didn't misunderstand, you can do this instead.

Gherkin

Scenario: Create random users
  Given I create "3" users

FeatureContext

var $str = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
var $status = [0, 1];
var $roles = ['authenticated user', 'admin', 'superman'];

/**
 * @Given /^I create "([^"]*)" users$/
 */
public function createDummyUsers($count)
{
    for ($i = 0; $i < $count; $i++) {
        $name = substr(str_shuffle($this->str), 0, 8);
        $status = $this->status[array_rand($this->status, 1)];
        $role = $this->roles[array_rand($this->roles, 1)];

        echo "You've just created $name - $status -$role" . PHP_EOL;
    }
}

Prints

You've just created mqBWAQJK - 1 - superman
You've just created WYuAZSco - 0 - admin
You've just created HCNWvVth - 1 - admin

You've just created EmLkVRpO - 1 -superman
You've just created pxWcsuPl - 1 -authenticated user
You've just created mLYrlKdz - 0 -superman