如何使用PHPExcel冻结标题和一组列

I want to freeze my page headers and columns like so:

I can freeze my headers absolutely fine and dandy:

    $highestRowCount = $sheet->getHighestRow();
    $highestColumnCount = $sheet->getHighestColumn();

    $sheet->freezePane( "{$highestColumnCount}2" );

But when I then add another freeze on the columns:

    $sheet->freezePane( "D{$highestRowCount}" );

It breaks excels ability to scroll...

How might I go about doing this?

You can only have one single freezePane on any individual worksheet, so you set the address to cover both horizontal and vertical, e.g.

$sheet->freezePane( "D2" );