caffeina-core / core

    return $res ? $res->fetchColumn($column) : null;

  }

  public function each($query, $params=[], callable $looper = null){

    if(!$this->connection()) return false;

    // ($query,$looper) shorthand

    if ($looper===null && is_callable($params)) {$looper = $params; $params = [];}

    if( $res = $this->exec($query,$params) ){

      if(is_callable($looper))

        while ($row = $res->fetchObject()) $looper($row);

      else

        return $res->fetchAll(PDO::FETCH_CLASS);

    }

  }

  public function single($query, $params=[], callable $handler = null){

    if(!$this->connection()) return false;

    }

  }

  public function single($query, $params=[], callable $handler = null){

    if(!$this->connection()) return false;

    // ($query,$handler) shorthand

    if ($handler===null && is_callable($params)) {$handler = $params; $params = [];}

    if( $res = $this->exec($query,$params) ){

        if (is_callable($handler))

          $handler($res->fetchObject());

        else

          return $res->fetchObject();

    }

  }

 public function run($script){

    if(!$this->connection()) return false;