INGIN Cloud SaaS. Login.

E: [2] Declaration of funzioni::fLogin() should be compatible with func::fLogin($elementi = NULL) || funzioni.class.php::0
E: [2] Declaration of funzioni::fInvioEmail($area, $info = NULL) should be compatible with func::fInvioEmail($a, $oggetto, $messaggio, $extra = NULL) || funzioni.class.php::0
E: [2] mysqli::__construct(): (HY000/1045): Access denied for user ''@'localhost' (using password: NO) || avvio.class.php::214
E: [] Exception: in /home/admin/web/gpro.softwarengineering.info/public_html/nucleo/avvio.class.php:218 Stack trace: #0 /home/admin/web/gpro.softwarengineering.info/public_html/nucleo/avvio.class.php(43): avvio->fConnessioneDB() #1 /home/admin/web/gpro.softwarengineering.info/public_html/config.inc.php(72): avvio->__construct(Array) #2 /home/admin/web/gpro.softwarengineering.info/public_html/index.php(2): include('/home/admin/web...') #3 {main} || avvio.class.php::
E: [8] Undefined index: username || funzioni.class.php::31
E: [8] Undefined variable: elementi || funzioni.class.php::50
E: [8] Undefined index: username || func.class.php::49
E: [8] Undefined index: || tpl.class.php::67