Warning: mysqli_connect(): Error while reading greeting packet. PID=14297 in /volume1/web/iteach4u/htdocs/2017/_lib/dbConfig.php on line 18

Fatal error: Uncaught mysqli_sql_exception: MySQL server has gone away in /volume1/web/iteach4u/htdocs/2017/_lib/dbConfig.php:18
Stack trace:
#0 /volume1/web/iteach4u/htdocs/2017/_lib/dbConfig.php(18): mysqli_connect('dikafryo.myds.m...', 'iteach4u', Object(SensitiveParameterValue))
#1 /volume1/web/iteach4u/htdocs/2017/_lib/config.php(243): include_once('/volume1/web/it...')
#2 /volume1/web/iteach4u/htdocs/2017/bullets/action/_like_ok.php(2): include('/volume1/web/it...')
#3 {main}
  thrown in /volume1/web/iteach4u/htdocs/2017/_lib/dbConfig.php on line 18