Fatal error: Uncaught ErrorException: Undefined variable $pdo in C:\!Server\Xampp\1sites\pa4h.ru\pzdx\chat.php:105 Stack trace: #0 C:\!Server\Xampp\1sites\pa4h.ru\pzdx\chat.php(105): {closure}(2, 'Undefined varia...', 'C:\\!Server\\Xamp...', 105) #1 {main} thrown in C:\!Server\Xampp\1sites\pa4h.ru\pzdx\chat.php on line 105