phpexcel使用

$objPHPExcel->getActiveSheet()->getStyle($cellRealName)->applyFromArray(
      array(
           ‘alignment‘ => array(
                ‘horizontal‘ => \PHPExcel_Style_Alignment::HORIZONTAL_CENTER
            )
     )
);

$objPHPExcel->setActiveSheetIndex(0)->setCellValue(‘A4‘, “Hello\nWorld”)；

$objPHPExcel->getActiveSheet()->getStyle(‘A4‘)->getAlignment()->setWrapText(true);