Fixing broken UTF-8 encoding

I am in the process of fixing some bad UTF-8 encoding. I am currently using PHP 5 and MySQL.

In my database I have a few instances of bad encodings that print like: î

• The database collation is utf8_general_ci
• PHP is using a proper UTF-8 header
• Notepad++ is set to use UTF-8 without BOM
• database management is handled in phpMyAdmin
• not all cases of accented characters are broken

I need some sort of function that will help me map the instances of î, í, ü and others like it to their proper accented UTF-8 characters.