PHP Warning: mysqli_connect(): (HY000/1129): Host '172.31.22.220' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts' in C:\inetpub\wwwroot\eventservice\2017\sas\1202_mysas\nmanager\config\db_info.php on line 19 PHP Warning: mysqli_set_charset() expects parameter 1 to be mysqli, boolean given in C:\inetpub\wwwroot\eventservice\2017\sas\1202_mysas\nmanager\config\db_info.php on line 20