Warning: mysqli::__construct(): Error while reading greeting packet. PID=2488 in /usr/share/nginx/coding/man_session.php on line 5

Fatal error: Uncaught mysqli_sql_exception: MySQL server has gone away in /usr/share/nginx/coding/man_session.php:5 Stack trace: #0 /usr/share/nginx/coding/man_session.php(5): mysqli->__construct() #1 /usr/share/nginx/html/index.php(8): include_once('...') #2 {main} thrown in /usr/share/nginx/coding/man_session.php on line 5