//  Create a new PHPExcel object with a single sheet
$objPHPExcel = new PHPExcel();

//  Set any styles here against the currently active sheet in $objPHPExcel

//  Get the current sheet with all its newly-set style properties
$objWorkSheetBase = $objPHPExcel->getSheet();

//  Create a clone of the current sheet,with all its style properties
$objWorkSheet1 = clone $objWorkSheetBase;
//  Set the newly-cloned sheet title
$objWorkSheet1->setTitle('Cloned Sheet');
//  Attach the newly-cloned sheet to the $objPHPExcel workbook
$objPHPExcel->addSheet($objWorkSheet1);

值得注意的是,即使在将数据写入该单元格之前,也可以为单元格设置样式