With those 2 lines of code in place the query will return no data. The purpose of the code was simply to try and extract the sql statement itself. You should now remove them as you have proven that the query is not at fault by running it in phpMyAdmin.

I must also stress that no ‘havoc’ is being caused. No data is being changed, moved or removed.

The next thing to look into is the url being generated. I  do not know which browser you are using but you should be able to open the browser console and select/turn on the ‘XHR’ tab only. Again – open the admin users section from the main menu and then chose the subs by user.

This should display the base url by displaying a GET statement in the console. Further tabs should enable you to view the Headers, Cookies, Params etc. We could do with taking a look at the headers section and Params section.

The terminology here comes from the Firefox browser so perhaps using that for this might be the best thing to do.