Illuminate\Database\Query\Builder::implode PHP Method

    public function implode($column, $glue = '')
    {
        return $this->pluck($column)->implode($glue);
    }

 /**
  * Concatenate values of a given column as a string.
  *
  * @param string $column
  * @param string $glue
  * @return string 
  * @static 
  */
 public static function implode($column, $glue = '')
 {
     return \Illuminate\Database\Query\Builder::implode($column, $glue);
 }