How to find unique values in array

Question

Here i want to find unique values,so i am writing code like this but i can\'t get answer,for me don\'t want to array format.i want only string

<         


        

Answer 1

";
  arr_count_val($arr1); // will print array with duplicate values

  function arr_unique($arr) {
    sort($arr);
    $curr = $arr[0];
    $uni_arr[] = $arr[0];
    for($i=0; $i "."$count"."
";
    $count=0;
    }
  }
?>