参考：
http://www.maatwebsite.nl/laravel-excel/docs
首先 引入
use Maatwebsite\Excel\Facades\Excel;
//逻辑
set_time_limit(0);
Excel::load('./1.xlsx', function ($reader) {
$sheet = $reader->getExcel()->getActiveSheet();
$sheet->setCellValue('H42', 'OKKKK');
//添加图片
$objDrawing = new \PHPExcel_Worksheet_Drawing();
$signature = './img/banner1.jpg';//路片路径
$objDrawing->setPath($signature);
$objDrawing->setCoordinates('E' . '42');//坐标
$objDrawing->setWidth(160);//图片宽
$objDrawing->setHeight(100);//图片高
$objDrawing->setWorksheet($reader->getActiveSheet());
})->export('xls');
