PHPExcel訪問顯示網頁可能暫時無法連接，或者它已永久性地移動到了新網址的原因

 $objWrite = PHPExcel_IOFactory::createWriter($obj, 'Excel2007');  

把上面的Excel2007換成Excel5就好了

 $objWrite = PHPExcel_IOFactory::createWriter($obj, 'Excel5');