Connection error: SQLSTATE[HY000] [2006] MySQL server has gone away<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function exec() on null in /var/www/html/index.php:13
Stack trace:
#0 {main}
  thrown in <b>/var/www/html/index.php</b> on line <b>13</b><br />