two-groups.php

<?php

function groupCreate($params) {
    $params = array_merge([
      'name' => 'Test Group 1',
      'domain_id' => 1,
      'title' => 'New Test Group Created',
      'description' => 'New Test Group Created',
      'is_active' => 1,
      'visibility' => 'Public Pages',
      'group_type' => [
        '1' => 1,
        '2' => 1,
      ],
    ], $params);

    return civicrm_api3('Group', 'create', $params);
}

$r = groupCreate([
  'name' => 'Test Group 1108.1',
  'title' => 'Test Group 1108.1',
]);

print_r($r);

$r2 = groupCreate([
  'name'  => 'Test Group 1108.2',
  'title' => 'Test Group 1108.2',
]);

print_r($r2);