PHP生成多个二级域名

生成数量：
域名：

". $subdomain . "." . $domain . "

"; } } function generateRandomString($length = 6) { $characters = '0123456789abcdefghijklmnopqrstuvwxyz'; $string = ''; for ($i = 0; $i < $length; $i++) { $string .= $characters[rand(0, strlen($characters) - 1)]; } return $string; } ?>