Codeigniter project to tidy up code

We've got a Codeigniter site that's been coded by various developers and we need some fixes (our recent developer has too much work at the moment) 1. Social media images not always being suggested when a page is shared - should be a simple fix. 2. The site uses IP2Location to find the user's IP address and therefore location. Sometimes this isn't being found, even when it's present (checked with their demo site). And sometimes it's throwing an error (see attached image - looks like non Ascii characters are being returned) Hopefully a simple fix. 3. If a user tries to log in to the site with Facebook but then clicks the "not now" link, there's a database error. Hopefully a simple fix. 4. The site uses a SQL query (already written and working fine) to return results. This works in several stages, expanding out if no results found. I will confirm the expansion logic with you - I don't think it's been properly implemented at the moment. A previous developer decided that it would be a good idea to run the query twice - once to find the number of results, a second time to return N results to display. This is very inefficient (basically it doubles the query time because the query takes about the same time to run each time) and needs fixing so that the query is only called once for any given set of results and then displays them. Should be a matter of tidying up the code. If we work well together there are more jobs in the future.