设置 headers 并下载文件后代码无法继续

Question

我有蛋糕 php 索引函数，它显示了一些订单图表。在此索引视图中，用户可以查看 select 日期，一旦表单提交，select 日期的订单图表就会更新。现在我正在尝试实现另一个功能，将数据导出到 excel，方法是向这两个日期 selects 添加简单的 select 选项。

问题是，当您不想导出 Excel 时，您必须设置 headers，一旦设置 header，代码就不会像我想要的那样连续.

这是我的索引函数

public function index() {
        $orderData = $this->Order->getDashboardOrdersStatisticBetweenData();

        if ($this->request->is('post') || $this->request->is('put')) {
            $dateFrom = $this->request->data['orderSumDates']['date_from'];
            $dateTo = $this->request->data['orderSumDates']['date_to'];
            $orderData = $this->Order->getDashboardOrdersStatisticBetweenData($dateFrom, $dateTo);
            if ($this->request->data['orderSumDates']['export_type'] == 'export_excel') {
                $this->generateExcelFile($orderData, $dateFrom, $dateTo);
                die('Code never gets here, but file is downloaded');
            }
        }

        $this->set('orderStatistic', $orderData);
    }

这是我生成 excel 文件的函数

protected function generateExcelFile($orderData, $dateFrom, $dateTo) {
        header('Content-type: application/vnd.ms-excel');
        header('Content-Disposition: attachment; filename="OrderReport'.$dateFrom.'-'.$dateTo.'.xlsx"');

        $objPHPExcel = new PHPExcel();
        $objPHPExcel->setActiveSheetIndex(0);
        // Summary of report
        $objPHPExcel->getActiveSheet()->SetCellValue('A5', 'Total number of orders');
        // Some other stuff
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
        $objWriter->save('php://output');

        header_remove('Content-type');
        header_remove('Content-Disposition');
    }

所以问题是如果我 select export_excel 选项，$this->generateExcelFile 函数被执行并且 excel 文件被下载，但是其余的代码永远不会发生，例如这个 die('Code never gets here, but file is downloaded'); 我不想被执行。我做了一些测试，如果我注释掉 $this->generateExcelFile 函数的 header() 部分，代码正常连续（die 被执行），但是 excel 文件没有正确生成，所以那些headers 是至关重要的。你能帮我解决我的问题吗？

Answer 1

您可以保存 Excel 文件，然后使用 Cakephp 内置函数将其发送到浏览器。

1 - 在您的 TMP 文件夹

上创建一个文件夹 files

app/tmp/files

2- 将在该文件夹中生成的文件保存在您的函数中，并且 return 文件位置

protected function generateExcelFile($orderData, $dateFrom, $dateTo) {
    //header('Content-type: application/vnd.ms-excel'); // REMOVE THIS LINE
    //header('Content-Disposition: attachment; filename="OrderReport' . $dateFrom . '-' . $dateTo . '.xlsx"'); // REMOVE THIS LINE

    $objPHPExcel = new PHPExcel();
    $objPHPExcel->setActiveSheetIndex(0);
    // Summary of report
    $objPHPExcel->getActiveSheet()->SetCellValue('A5', 'Total number of orders');
    // Some other stuff
    $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');

    $tmpFile = TMP . "files" . DS . sprintf("excel-file-%s.xlsx", date('Y-m-d-H-i-s')); // The tmp file
    $objWriter->save($tmpFile); // Save on excel file
    return $tmpFile; //send the file location

    //$objWriter->save('php://output'); // REMOVE THIS LINE

    //header_remove('Content-type'); // REMOVE THIS LINE
    //header_remove('Content-Disposition'); // REMOVE THIS LINE
}

3- 根据您的操作，删除此文件后将该文件内容发送到浏览器

public function index() {
    $orderData = $this->Order->getDashboardOrdersStatisticBetweenData();

    if ($this->request->is('post') || $this->request->is('put')) {
        $dateFrom = $this->request->data['orderSumDates']['date_from'];
        $dateTo = $this->request->data['orderSumDates']['date_to'];
        $orderData = $this->Order->getDashboardOrdersStatisticBetweenData($dateFrom, $dateTo);
        if ($this->request->data['orderSumDates']['export_type'] == 'export_excel') {
            $excelFile = $this->generateExcelFile($orderData, $dateFrom, $dateTo);
            //Get the file content
            $content = file_get_contents($excelFile);
            //Delete that file
            unlink($excelFile);
            //Put the content on the response
            $this->response->body($content);
            //Force download (test.xlsx is the file name browser will recieve)
            $this->response->download("test.xlsx");
            //spécify the response type
            $this->response->type("application/vnd.ms-excel");
            //send the response
            return $this->response;
        }
    }

    $this->set('orderStatistic', $orderData);
}

设置 headers 并下载文件后代码无法继续

Code doesn't continue after setting headers and downloading file

php

cakephp

phpexcel

cakephp-2.0