remove duplicate from string in PHP

Question

I am looking for the fastest way to remove duplicate values in a string separated by commas.

So my string looks like this;

$str = \'one,two,one,five,         


        

Answer 1

The shortest code would be:

$str = implode(',',array_unique(explode(',', $str)));

If it is the fastest... I don't know, it is probably faster then looping explicitly.

Reference: implode, array_unique, explode