代码点火器+；PHPExcel库问题

我正在使用PHPExcel库，如图所示。但是，tt没有按预期工作。当我搜索时，有人建议将

PHPEXcel\u IOFactory

替换为

IOFactory

。它下载文件，但无法打开。有什么建议吗

这是我的库代码：

Excel.php

require_once APPPATH.'/third_party/PHPExcel.php';
class Excel extends PHPExcel
{
    public function __construct()
    {
        parent::__construct();
    }
}

以下是控制器代码：

        #load our new PHPExcel library
        $this->load->library('excel');

        $data = $this->report_model->get_all_report_product_info();
        $filename = "Output";

        # Set the active Excel worksheet to sheet 0 
        $this->excel->setActiveSheetIndex(0);

        $row_count = 2;
        foreach ($data as $row) {
            $this->excel->getActiveSheet()->setCellValue('A' . $row_count, $row->product_name);
            $this->excel->getActiveSheet()->setCellValue('B' . $row_count, $row->product_sku);
            $this->excel->getActiveSheet()->setCellValue('C' . $row_count, $row->customer_name);
            $this->excel->getActiveSheet()->setCellValue('D' . $row_count, $row->site_url);
            $row_count++;
        }

        header('Content-Type: application/vnd.ms-excel');
        header('Content-Disposition: attachment;filename="' . $filename . '.xlsx"');
        header('Cache-Control: max-age=0');

        // Instantiate a Writer to create an OfficeOpenXML Excel .xlsx file
        $objWriter = IOFactory::createWriter($this->excel, 'Excel5');

        // Write the Excel file to filename
        $objWriter->save('php://output');

“Excel5”是旧的电子表格格式（用于.XLS文件）。如果要创建XLSX文件，需要使用“Excel2007”

“Excel5”是旧的电子表格格式（用于.XLS文件）。如果要创建XLSX文件，需要使用“Excel2007”

$objWriter = IOFactory::createWriter($this->excel, 'Excel5');