我做的唯一改变是
$dbHost = <hostname>
到
$dbHost = <ipaddress>
现在它给了我连接错误。
错误：
Database Connection Error
A failure occurred attempting to connect to the database.
This could be caused by a temporary network failure, but it's more likely that this is the result of incorrect database connection parameters specified at the time WebEvent was installed.
Please contact your site administrator for assistance in diagnosing this problem.