Email and URL validators in PHP

public static function is_valid_url($url){
  return preg_match('!^(http|https)://([\w-]+\.?)+[\w-]+(:\d+)?(/[\w- ./?~%&=+\']*)?$!', $url);
}

public static function is_valid_email($email){
  return preg_match('/^(([a-zA-Z0-9_.\-+!#$&\'*+=?^`{|}~])+\@((([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+|localhost) *,? *)+$/', $email);
}