I am trying to figure out how to validate a section of a form using php. If at least one of value 1-5 is checked, then at least one of value A-E must be checked. Value's A-E cannot be allowed without at least one of 1-5 being checked. Multiple values in each section can be selected, as long as there is at least one value in each section checked.

I have tried individual IF statements and arrays without success.

Does anyone have any suggestions or examples? I am missing something and I am certain it is pretty obvious, right in my face.