thousand number converter

public static function conveter($num) {
        if($num>1000) {

              $x = round($num);
              $x_number_format = number_format($x);
              $x_array = explode(',', $x_number_format);
              $x_parts = array('k+', 'm+', 'b+', 't+');
              $x_count_parts = count($x_array) - 1;
              $x_display = $x;
              $x_display = $x_array[0] . ((int) $x_array[1][0] !== 0 ? '.' . $x_array[1][0] : '');
              $x_display .= $x_parts[$x_count_parts - 1];

              return $x_display;

        }

        return $num;
    }