我正在尝试从大约300列,大约12100行的表中导出数据。当我尝试使用PHPExcel导出时,它会永远加载,同时进程HTTPD.EXE(APACHE)占用50%的CPU并最终在大约30分钟后失败。
我已经研究并提出了所有改进技巧,但仍然没有区别。
从数据库中提取数据的查询需要0.3180秒,因此我知道问题不在于此问题,问题是写入Excel。
以下是我的代码片段
$objPHPExcel = new PHPExcel();
$sql = "SELECT * from LAPDATATABLE order by file_modified";
$lrs = CDB::ExecuteQuery($sql);
$i = 2;
$objPHPExcel->setActiveSheetIndex(0);
$exceldata = $objPHPExcel->getActiveSheet();
$exceldata->setCellValue("A" . 1 , "ITEM" );
$exceldata->setCellValue("B" . 1 , "attachment" );
$exceldata->setCellValue("C" . 1 , "ITEM_DETAIL" );
....
....
....
while ($rows = CDB::GetAssoc($lrs))
{
$exceldata->setCellValue("A" . $i , $rows['ITEM']);
$exceldata->setCellValue("B" . $i , $rows['attachment']);
$exceldata->setCellValue("C" . $i , $rows['ITEM_DETAIL']);
...
...
...
$i++;
}
// Rename worksheet
$objPHPExcel->getActiveSheet()->setTitle('LAP-TAB-DATA');
// Set active sheet index to the first sheet, so Excel opens this as the first sheet
$objPHPExcel->setActiveSheetIndex(0);
// Redirect output to a client’s web browser (Excel5)
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="Raw-Lap-Data.xlsx"');
header('Cache-Control: max-age=0');
// If you're serving to IE 9, then the following may be needed
header('Cache-Control: max-age=1');
// If you're serving to IE over SSL, then the following may be needed
header ('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header ('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT'); // always modified
header ('Cache-Control: cache, must-revalidate'); // HTTP/1.1
header ('Pragma: public'); // HTTP/1.0
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->save('php://output');
exit;
也许有人可以在我的代码中看到错误,或者可以建议这就是编写这么多列的方式吗?
由于