问CodeIgniter中的PHPWord类未正确生成，并在word文件中引发错误

EN

public function export()
    {
            // Load PHPWORD Library
            $this->load->library('PHPWord');
            $sec = $this->phpword->createSection($secStyle);

            $header = $sec->createHeader();
            $header->addWatermark('images/CC_watermark.png', array('marginTop'=>1015, 'marginLeft'=>-80));

            $resultSelected = $this->input->post('cbox');
            foreach($resultSelected as $row)
            {
               $sec->addText($row);
               echo $row."<br>";
            }

            $fileName = "Plan_Generate_".date('Ymd').".docx";

            // Force Download
            $filePath = $fileName;

               $fileName = basename($filePath);
               // $fileSize = filesize($filePath);

               // Output headers.
               header("Cache-Control: private");
               header("Content-Type: application/stream");
               // header("Content-Length: ".$fileSize);
               header("Content-Disposition: attachment; filename=".$fileName);

               // Output file.
               // readfile ($filePath);
               // exit();


            // Save File
            // $fileName = "files/SomethingNew_".date("Ymd").".docx";
            $objWriter = PHPWord_IOFactory::createWriter($this->phpword, 'Word2007');
            $objWriter->save('php://output');
    }