When using this library:
https://github.com/colshrapnel/safemysql/blob/master/ safemysql.class.php

Caused function:

$ id = 1;
$ db- & gt; getROW ("Select * from table where id =? i", $ ID);

Embodges: Call to a Member Function GetROW () on NULL IN Why, how to solve?

Answer 1, Authority 100%

Somewhere above in the code, there was no connection to the database for any reason.
As a result, the $ DB no connection links. And you do not see it trying to work with him.

How to decide: Check what exactly lies in $ db and make sure the handler database there