PHP生成随机二级域名脚本示例

$mainDomain = 'sgreen.top';
$subDomains = array();
for ($i = 0; $i < 10; $i++) {
  $subDomain = '';
  $characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
  $length = rand(3, 10);
  for ($j = 0; $j < $length; $j++) {
    $subDomain .= $characters[rand(0, strlen($characters) - 1)];
  }
  $subDomains[] = $subDomain;
}
$domains = array();
foreach ($subDomains as $subDomain) {
  $domains[] = $subDomain . '.' . $mainDomain;
}

// 输出结果
print_r($domains);