Because the company needs, the need for export function to rewrite the package.
In the packaging process, need to export images, when exporting the image needs to be noted that each time through the data instance of a derived class to export images
$ objDraw = new PHPExcel_Worksheet_Drawing ();
otherwise is being given, the specific cause of the error can go to view the extended source. Another point to note is that merging cells time to pay attention to the assignment and then merge.