Sorry, this isn’t something we support but I’m sure if you search the web you will find many resources to help if you wish to learn php. Perhaps pages explaining how you can debug/troubleshoot problems is worth looking for as well to help you understand exactly what you are experiencing
There is nothing special to this using Codio. you work with php in 16.04 exactly the same way as you do in 14.04.
Also what is the problem that
a: you can’t resolve from other posts on the web (ie stackoverflow is good place to use - search for whatever ‘errors’ you are seeing in your logs etc… if question hasn’t been asked before, raise it there… other dev’s can also help you there)
b: what is different to your last message you sent where we saw the code in your php file was incorrect where we recommended you search the web for something like “php hello world example” that should have helped
c: if you recreate the exact same project using the our existing LAMP stack (that is 14.04) and that works OK, then would suggest something in how you have set up your 16.04 project from the default 16.04 stack but your logs in the box would help you check all this