remove duplicate from string in PHP -

remove duplicate from string in PHP -

i looking fastest way remove duplicate values in string separated commas.

so string looks this;

$str = 'one,two,one,five,seven,bag,tea';

i can exploding string values , compare, think slow. preg_replace() faster? 1 did using function?

the shortest code be:

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

if fastest... don't know, faster looping explicitly.

reference: implode, array_unique, explode

php string duplicates