ページの印刷方向を縦に設定

<?php
require_once 'Spreadsheet/Excel/Writer.php';

$workbook = new Spreadsheet_Excel_Writer();
$worksheet =& $workbook->addWorksheet();

// ページの印刷方向を縦に設定
$worksheet->setPortrait();
$worksheet->writeString(0, 0, "abc");
$worksheet->writeString(1, 0, "123");
$workbook->send('setPortrait.xls');
$workbook->close();

setPortrait で印刷方向を変更。

$worksheet->setPortrait();