Faker\Generator::seed PHP Method

    public function seed($seed = null)
    {
        if ($seed === null) {
            mt_srand();
        } else {
            if (PHP_VERSION_ID < 70100) {
                mt_srand((int) $seed);
            } else {
                mt_srand((int) $seed, MT_RAND_PHP);
            }
        }
    }

 /**
  * @return Generator
  */
 private function faker()
 {
     if (null === $this->faker) {
         $this->faker = Factory::create('en_US');
         $this->faker->seed(9000);
     }
     return $this->faker;
 }