protected function getDataColumn($column) {
		if (function_exists('array_column')) {
			return array_column($this->_data, $column);
		}
		
		$columnData = [];
		
		foreach ($this->_data as $row) {
			$columnData[] = $row[$column];
		}
		
		return $columnData;
	}
protected function getDataColumn($column) {
		if (function_exists('array_column')) {
			return array_column($this->_data, $column);
		}
		
		$columnData = [];
		
		foreach ($this->_data as $row) {
			$columnData[] = $row[$column];
		}
		
		return $columnData;
	}
protected function getDataColumn ( $ column ) { if ( function_exists ( 'array_column' ) ) { return array_column ( $ this -> _data , $ column ) ; } $ columnData = [ ] ; foreach ( $ this -> _data as $ row ) { $ columnData [ ] = $ row [ $ column ] ; } return $ columnData ; }
Get the data column

@param  string $column
@return array
Get the data column