Php weak random value generator for cases where repeated values are useful

I a, generating test data for use in my frontend and i want to generate ages. Currently i am generating age between 18 and 100 using rand(1,100) like this:

require_once 'vendor/autoload.php';
$faker = Faker\Factory::create();

$superstars = array("Adam Cole","Finn Balor","Pete Dunne","Jordan Devlin","Noam Dar");
$fan_favourite_superstar_name = $superstars[ mt_rand( 0, count($superstars) -1 ) ];

$cities = array("London","Manchester","Leeds","Bristol");
$fan_location = $cities[ mt_rand( 0, count($cities) -1 ) ];

$the_models = array("Iphone","Nokia","Huawei","Samsung");
$fan_phone_model = $the_models[ mt_rand( 0, count($the_models) -1 ) ];


$array = Array (
    "0" => Array (
        "id" => uniqid(),
        "fan_favourite_superstar_name" => $fan_favourite_superstar_name,
        "fan_location" => $fan_location,
        "fan_phone_model" => $fan_phone_model,
        "fan_name" => $faker->name,
        "fan_age" => rand(18,100),
        "fan_comments" => $faker->text,
        "fan_picture" => rand(1,500),
        "last_updated" => time() + rand(1,1000),
    ),

However, i would like my ages to repeat although not completely. Is there a weak randomness generator apart from rand that can ensure that the an ages generated randomly repeat themselves n times?.