How to remove all instances of duplicated values from an array

[MonTheHoops]

I know there is \[code\]array_unique\[/code\] function, but I want to remove duplicates. Is there a built-in function or do I have to roll my own.Example input:\[code\]banna, banna, mango, mango, apple\[/code\]Expected output:\[code\]apple\[/code\]