Warning: mysqli_connect(): Error while reading greeting packet. PID=12789 in /home/classem/public_html/_include/funcao/conectar-bd.php on line 4

Warning: mysqli_connect(): (HY000/2006): MySQL server has gone away in /home/classem/public_html/_include/funcao/conectar-bd.php on line 4
Erro na conexão do banco de dados.