Stuff

class email{  static function is_valid($str_email)   {    if (!eregi('^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,4})$', $str_email)) {       return false;    }    return true;  }}