public static function replaceSubdomain($domain, $subdomain)
{
$parsedUrl = parse_url($domain);
$host = explode('.', $parsedUrl['host']);
if (count($host) > 0) {
$oldSubdomain = $host[0];
$domain = str_replace("://{$oldSubdomain}.", "://{$subdomain}.", $domain);
}
return $domain;
}