UTF Encoding Issue

I need an expert developer to fix the current UTF encoding issue, the issue was fixed few weeks ago - but it came back again. I need an expert to fix this issue with clean code and script. Previous developer need not apply for this project. Advance knowledge of MySQL, CSS, Java Script, PHP skills is needed. To apply you must give evidence for all the essential and nice-to-have skills and experience you have. The developer should set out the hourly rate within the proposed fixed price. No time waster please. The clarification about the project will be given today.