PHPExcel - 读取行注释，文本删除丢失

Am trying to read excel file with PHPExcel library

https://github.com/PHPOffice/PHPExcel

however when i read row then am not able to get comments on field and strikes on text also missing .

my code is

include 'PHPExcel/IOFactory.php';
$ftype = 'Excel2007';
$fname = 'data.xlsx';
$objexcel = PHPExcel_IOFactory::load($fname);
$sdata = $objexcel->getActiveSheet()->toArray(null,true,true,true);
foreach ($sdata as $k=>$d) {
        print_r($d);  // output
}

so it output comments and strikes which are in data.xlsx file are missing . any idea how to display and check if row have comments and strikes through text