public function addColumn($id, $label, $type) {
        $this->cols[] = new DataColumn($id, $label, $type);
    }
public function addColumn($id, $label, $type) {
        $this->cols[] = new DataColumn($id, $label, $type);
    }
public function addColumn ( $ id , $ label , $ type ) { $ this -> cols [ ] = new DataColumn ( $ id , $ label , $ type ) ; }
Adds a column at the end of the DataTable
@param string $id
@param string $label
@param string $type
Adds a column at the end of the DataTable