setActiveSheetIndex无法正常工作

I'm using PHPExcel to make export xls with 2 worksheets. When I open the generated xls file, it opens directly to the second worksheet, even though I've declared in the code that generates the first worksheet:

$objPHPExcel->setActiveSheetIndex(0) 

This happened after I'd added the following lines in the code that generates the second worksheet.

$objPHPExcel->getSheet(1)->getStyle('A1:E1')->getFont()->setBold(true);

    $objPHPExcel->getSheet(1)->getColumnDimension('A')->setWidth(15);
    $objPHPExcel->getSheet(1)->getRowDimension(1)->setRowHeight(40);
    $objPHPExcel->getSheet(1)->getStyle('A:F')->getAlignment()->setWrapText(true); 
    $objPHPExcel->getSheet(1)->getColumnDimension('B')->setWidth(40);
    $objPHPExcel->getSheet(1)->getStyle('B')->getAlignment()->setWrapText(true); 
    $objPHPExcel->getSheet(1)->getColumnDimension('C')->setWidth(15);
    $objPHPExcel->getSheet(1)->getColumnDimension('D')->setWidth(15);
    $objPHPExcel->getSheet(1)->getColumnDimension('E')->setWidth(15);
    $objPHPExcel->getSheet(1)->getColumnDimension('E')->setAutoSize(true);

    $objPHPExcel->getSheet(1)->getPageMargins(1)->setTop(1);
    $objPHPExcel->getSheet(1)->getPageMargins(1)->setRight(0.75);
    $objPHPExcel->getSheet(1)->getPageMargins(1)->setLeft(0.75);
    $objPHPExcel->getSheet(1)->getPageMargins(1)->setBottom(1);

    $objPHPExcel->getSheet(1)->getStyle('A1:E1')->getFill()
                    ->setFillType(PHPExcel_Style_Fill::FILL_SOLID)
                    ->getStartColor()->setRGB('4EE900');

If I comment some of the code lines, (as shown in the picture) the active sheet index works fine.

So, if I remove these lines, it works fine. Any Idea how to fix this to keep first worksheet as the active worksheet?

Creating a new worksheet automatically sets that as the active sheet.

Unless you use $objPHPExcel->setActiveSheetIndex(0); after creating your second worksheet, then the second sheet will be your active sheet.

And you can always set the active sheet manually just before your save using

$objPHPExcel->setActiveSheetIndex(0);