webiste url filter with pregx
$url = "https://www.azonedev.com";
$url_to_main_domain = preg_replace('/(https|http|:|\/\/|www.|\s)/i','',$url);
$remove_sub_dir_from_url = preg_replace('/(\/).*/','',$url_to_main_domain);
echo $remove_sub_dir_from_url;