Remove duplicate in string

[drisate]

Hey guys i have a string that looks like this

 

-3--3--3--3--3--3--3--3--3--3--10--10--10--10--10--10--10--10--10--10--7--7--7--7--7--7--7--7--7--7--12--12--12--12--12--12--12--12--12--12--1--1--1--1--1--1--1--1--1--1--19--19-

 

How can i remove the duplicates so it looks like

 

-3--10--7--12--1--19-

 

It needs to be fast because there will be a lot of strings to be checked

[RichardRotterdam]

these functions might help you

array_unique

explode

implode

preg_match

 

[drisate]

Thx this is what i did for future ref

 

          $list3 = implode("-" , array_unique(explode("-",$bouton[bouton])));

          $ex = explode ('-', $list3);

          foreach($ex as $value){

            if ($value){

                $string .= "-$value-";

            }

          }