在codeigniter中使用PHPExcel从数据库创建Excel工作表

我正在尝试使用Codeigniter中的PHPExcel从数据库创建一个excel工作表，以生成报告。我有主表

sales

和4个以上的表，我从中获取数据。我已经使用表之间的多个联接编写了查询

以下是我的设想：

在我处理生成销售报告时，客户可能购买了多个产品，这些详细信息存储在另一个表

sale\u items

中。目前，我已经为其他表编写了一个带有连接的主查询，在foreach循环中获得结果后，我正在编写另一个查询，以从

sale\u items

表中选择相应的数据

我试图在excel表格中为单个客户显示，如果他购买了多个产品，我需要在excel表格中以逗号分隔显示这些产品。我使用了第二个查询来获取产品名称，并对结果进行了内爆，并尝试在excel中的相应行中显示。如果我和一个客户一起尝试，效果很好。如果我为多个客户尝试，页面将显示服务器错误

这是我的密码：

    $dateTmp = "DATE_FORMAT(".$this->db->dbprefix('sales').".date,'%m/%Y')";
    $condition = "if(".$this->db->dbprefix('sales').".biller_id = 5, 'A', if(".$this->db->dbprefix('sales').".biller_id = 6, 'B',if(".$this->db->dbprefix('sales').".biller_id = 7,'C','D'  )))";       


    if ($pdf || $xls) {
    $this->db
    ->select("date, ".$this->db->dbprefix('warehouses').".name, 
    CONCAT(".$this->db->dbprefix('warehouses').".name,'-',".$dateTmp.",'-', ".$condition.",".$this->db->dbprefix('sales').".invoice_no) as month," 
    ." biller, customer,
    scan_no, CONCAT(" . $this->db->dbprefix('sale_items') . ".product_name, '__', " . $this->db->dbprefix('sale_items') . ".quantity) as iname, 
    unit_price,if(tax_rate_id=2,item_tax,0) as taxId1,if(tax_rate_id=4,item_tax,0) as taxId2 ,
    tin,cin,cst,total_discount, item_tax, shipping,subtotal,payment_status,sales.id as saleid ", FALSE)
    ->from('sales')
    ->join('sale_items', 'sale_items.sale_id=sales.id', 'left')
    ->join('companies','companies.id=sales.customer_id', 'left')
    ->join('salersperson','salersperson.id=companies.salesperson_id', 'left')
    ->join('hosipital_group','hosipital_group.id=companies.hospital_id', 'left')
    ->join('doctor','doctor.id=companies.dr_id', 'left')
    ->join('warehouses', 'warehouses.id=sales.warehouse_id', 'left')
    ->group_by('sales.id')
    ->order_by('sales.date desc');  //MAIN JOIN QUERY

    $q = $this->db->get();
    if ($q->num_rows() > 0) {
    foreach (($q->result()) as $row) {
    $data[] = $row;
    }
    } else {
    $data = NULL;
    }

    if (!empty($data)) 
    {
    $this->load->library('excel');
    $this->excel->setActiveSheetIndex(0);
    $this->excel->getActiveSheet()->setTitle(lang('sales_report'));
    $this->excel->getActiveSheet()->SetCellValue('A1', lang('date'));
    $this->excel->getActiveSheet()->SetCellValue('B1', lang('branch'));

    $this->excel->getActiveSheet()->SetCellValue('C1', lang('invoice_no'));
    $this->excel->getActiveSheet()->SetCellValue('D1', lang('biller'));

    $this->excel->getActiveSheet()->SetCellValue('E1', lang('customer'));
    $this->excel->getActiveSheet()->SetCellValue('F1', lang('tin'));
    $this->excel->getActiveSheet()->SetCellValue('G1', lang('cin'));
    $this->excel->getActiveSheet()->SetCellValue('H1', lang('cst'));

    $this->excel->getActiveSheet()->SetCellValue('I1', lang('scan_no'));
    $this->excel->getActiveSheet()->SetCellValue('J1', lang('product_qty'));
    $this->excel->getActiveSheet()->SetCellValue('K1', lang('prod_price'));
    $this->excel->getActiveSheet()->SetCellValue('L1', lang('vat1'));
    $this->excel->getActiveSheet()->SetCellValue('M1', lang('vat2'));
    $this->excel->getActiveSheet()->SetCellValue('N1', lang('discount'));
    $this->excel->getActiveSheet()->SetCellValue('O1', lang('product_tax'));
    $this->excel->getActiveSheet()->SetCellValue('P1', lang('shipping'));
    $this->excel->getActiveSheet()->SetCellValue('Q1', lang('total'));

    $row = 2;
    $total = 0;
    $paid = 0;
    $balance = 0;

    foreach ($data as $data_row) {
    $saleid=$data_row->saleid;
    $this->db->select("product_name")
    ->from('sale_items')
    ->where('sale_items.sale_id',$saleid); /*SECOND QUERY TO FETCH FROM SALE_ITEMS TABLE*/
    $q1 = $this->db->get();
    if ($q1->num_rows() > 0) 
    {
    foreach (($q1->result()) as $row1) 
    {
    $prdtarray[] = $row1->product_name; 
    }
    $product=implode(',',$prdtarray); /*PRODUCTS NAME SEPARATED BY COMMA AND STORED IN A VARIABLE*/
    } 
    else 
    {
    $data1 = NULL;
    }

    $this->excel->getActiveSheet()->SetCellValue('A' . $row, $this->sma->hrld($data_row->date));
    $this->excel->getActiveSheet()->SetCellValue('B' . $row, $data_row->name);
    $this->excel->getActiveSheet()->SetCellValue('C' . $row, $data_row->month);
    $this->excel->getActiveSheet()->SetCellValue('D' . $row, $data_row->biller);

    $this->excel->getActiveSheet()->SetCellValue('E' . $row, $data_row->customer);
    $this->excel->getActiveSheet()->SetCellValue('F' . $row, $data_row->tin);
    $this->excel->getActiveSheet()->SetCellValue('G' . $row, $data_row->cin);
    $this->excel->getActiveSheet()->SetCellValue('H' . $row, $data_row->cst);

    $this->excel->getActiveSheet()->SetCellValue('I' . $row, $data_row->scan_no);

    $this->excel->getActiveSheet()->SetCellValue('J' . $row, $product); //THE COMMA SEPARATED PRODUCT NAMES
    $this->excel->getActiveSheet()->SetCellValue('K' . $row, $data_row->unit_price);
    $this->excel->getActiveSheet()->SetCellValue('L' . $row, $data_row->taxId1);
    $this->excel->getActiveSheet()->SetCellValue('M' . $row, $data_row->taxId2);
    $this->excel->getActiveSheet()->SetCellValue('N' . $row, $data_row->total_discount);
    $this->excel->getActiveSheet()->SetCellValue('O' . $row, $data_row->item_tax);
    $this->excel->getActiveSheet()->SetCellValue('P' . $row, $data_row->shipping);
    $this->excel->getActiveSheet()->SetCellValue('Q' . $row, $data_row->subtotal);

    $total += $data_row->subtotal;
    $paid += $data_row->item_tax;
    // $balance += ($data_row->grand_total - $data_row->paid);
    $row++;
    }
    $this->excel->getActiveSheet()->getStyle("L" . $row . ":M" . $row)->getBorders()
    ->getTop()->setBorderStyle(PHPExcel_Style_Border::BORDER_MEDIUM);
    $this->excel->getActiveSheet()->SetCellValue('Q' . $row, $total);
    $this->excel->getActiveSheet()->SetCellValue('O' . $row, $paid);
    // $this->excel->getActiveSheet()->SetCellValue('H' . $row, $balance);

    $this->excel->getActiveSheet()->getColumnDimension('A')->setWidth(20);
    $this->excel->getActiveSheet()->getColumnDimension('B')->setWidth(20);

    $this->excel->getActiveSheet()->getColumnDimension('C')->setWidth(20);
    $this->excel->getActiveSheet()->getColumnDimension('D')->setWidth(30);
    $this->excel->getActiveSheet()->getColumnDimension('E')->setWidth(15);
    $this->excel->getActiveSheet()->getColumnDimension('F')->setWidth(15);
    $this->excel->getActiveSheet()->getColumnDimension('G')->setWidth(15);
    $this->excel->getActiveSheet()->getColumnDimension('H')->setWidth(20);

    $this->excel->getActiveSheet()->getColumnDimension('I')->setWidth(20);
    $this->excel->getActiveSheet()->getColumnDimension('J')->setWidth(20);

    $this->excel->getActiveSheet()->getColumnDimension('K')->setWidth(15);

    $this->excel->getActiveSheet()->getColumnDimension('L')->setWidth(30);
    $this->excel->getActiveSheet()->getColumnDimension('M')->setWidth(30);
    $this->excel->getActiveSheet()->getColumnDimension('N')->setWidth(15);

    $this->excel->getActiveSheet()->getColumnDimension('O')->setWidth(30);
    $this->excel->getActiveSheet()->getColumnDimension('P')->setWidth(30);
    $this->excel->getActiveSheet()->getColumnDimension('Q')->setWidth(30);

    $filename = 'sales_report';
    $this->excel->getDefaultStyle()->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);

    if ($xls) {
    $this->excel->getActiveSheet()->getStyle('E2:E' . $row)->getAlignment()->setWrapText(true);
    ob_clean();
    header('Content-Type: application/vnd.ms-excel');
    header('Content-Disposition: attachment;filename="' . $filename . '.xls"');
    header('Cache-Control: max-age=0');
    ob_clean();
    $objWriter = PHPExcel_IOFactory::createWriter($this->excel, 'Excel5');
    $objWriter->save('php://output');
    exit();
    }

    }
    $this->session->set_flashdata('error', lang('nothing_found'));
    //redirect($_SERVER["HTTP_REFERER"]);

    } 

---

我不知道当我尝试与多个客户合作时会发生什么。也许我的逻辑错了。谁能帮我找出我的错误吗。。？？提前感谢

您查看服务器日志了吗？您遇到了什么错误？我检查了PHP错误日志，发现如下

PHP致命错误：第1717行中允许的内存大小134217728字节已用尽（尝试分配78313字节）

第1717行是：

$product=infrade（'，'，$prdtarray）

什么是

$prdtarray

数组的大小？实际上这是foreach循环中的一个数组，你可以在我的代码中看到它。你检查了服务器日志了吗？您遇到了什么错误？我检查了PHP错误日志，发现如下

PHP致命错误：第1717行中允许的内存大小134217728字节已用尽（尝试分配78313字节）

第1717行是：

$product=infrade（'，'，$prdtarray）

什么是

$prdtarray

数组的大小？实际上，这是foreach循环中的一个数组，您可以在我的代码中看到它