tp5中phpexcel生成表格实例分享

最近项目中需要使用使用phpexcel生成表格，但是在由网页导出excel时，文件的后缀总是会带上html。后来调试了半天发现，需要在header头输出之前使用ob_end_clean( )去清除php缓冲区中的内容。因为在herder头输出之前，php是不能有任何输出的，哪怕是一个空格，一旦有了输出，你设置的php header头就无效了，因为此时的header头信息早已经固定。

输出excle时出现乱码的情况也是用这种方式解决。

 /**
     * 下载excel表格
     */
    public function down_excel()
    {
        $params = $_GET;
        $filename = $params['cname'] . '收银明细列表' . date('Y-m-d');
        $objPHPExcel = new \PHPExcel();
        //设置表头信息
        $letter = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L');
        $excel_column = array(
            'id' => "订单号",
            'dt' => "交易时间",
            'money' => "金额",
            'status' => "交易状态",
            'pay_type' => "支付渠道",
            'device' => "终端号",
            'operator' => "收银员",
            'pay_id' => "渠道流水号",
            'client_name' => "商户名称",
            'pay_scense' => "支付场景",
            'operate_fee' => "手续费",
            'no' => "小票单号",
        );
        $new_letter = [];
        $new_excel_column = [];
        foreach ($params['act_name'] as $k => $d) {
            $new_letter[$d] = $letter[$k];
            $new_excel_column[$d] = $excel_column[$d];
        }
        foreach ($new_excel_column as $k => $d) {
            //设置行宽自动调整
            $objPHPExcel->getActiveSheet()->getColumnDimension($new_letter[$k])->setWidth(12);
            $objPHPExcel->getActiveSheet()->setCellValue($new_letter[$k] . '1', $d);
        }
        //填充表格信息
        $data['rows'] = [];
        foreach ($params['down_class'] as $item) {
            switch ($item) {
                case 'pay_success':
                    $params['dm_status'] = 2;
                    break;
                case 'refund_success':
                    $params['dm_status'] = 4;
                    break;
                case 'pay_fail':
                    $params['dm_status'] = 3;
                    break;
                case 'pay_undefined':
                    $params['dm_status'] = 5;
                    break;
            }
            $ret = $this->getData($params);
            $data['rows'] = array_merge($data['rows'], $ret['rows']);
        }
        $total = 0;
        if (!empty($data['rows'])) {
            foreach ($data['rows'] as $k => $d) {
                $i = $k + 2;
                foreach ($new_letter as $key => $item) {
                    //填充数据
                    $objPHPExcel->getActiveSheet()->setCellValue($item . $i, strip_tags($d[$key]));
                }
                $total += strip_tags($d['money']);
            }
        }
        $index = count($data['rows']) + 2;
        $objPHPExcel->getActiveSheet()->mergeCells("A{$index}:B{$index}");
        $objPHPExcel->getActiveSheet()->setCellValue('A' . $index, '合计');
        $objPHPExcel->getActiveSheet()->setCellValue('C' . $index, $total);
        //保存表格版本格式
        $objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel,"Excel2007");
        //下载表格
        ob_end_clean();    //关闭缓冲区之后再输出header头，在header设置之前，可能某个地方有了输出，导致Content-Type的类型为text/html,所以输出的表格后缀才会是html
        header('Content-Type: application/octet-stream');
        header("Content-Disposition: attachment; filename=\"{$filename}.xlsx\"");
        $objWriter->save("php://output");
    }

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