memory exeeds while creating big xls-file

Topics: Developer Forum, User Forum
Aug 28, 2012 at 9:52 AM

Hi there,

I encounter some problems while creating a big xls(5)-file.
After a while I receive a 500-error. No error-info is written to the logfile.
Sometimes I get a timeout or memory exeeded error.

What I am doing:
Doing some SQL-querys to get some data. The data will be approx. 5000 rows long and about 50 columns wide. There will be numbers and text in the xls-doc.

printing the data with print_r() will output the data within 10 seconds.

Putting this data into an excel-doc will fail (see above).

Almost every cell is styled with an format-information


Are there any options to write data direct to harddrive, and therefore no memory errors will occur. How is it done creating big xls-files? Am I doing something wrong.

See below some snippets of my code.

require_once '../PHPExcel.php';
$xls = new PHPExcel();
$orientation = array(
'horizontal' => PHPExcel_Style_Alignment::HORIZONTAL_CENTER,
'vertical'   => PHPExcel_Style_Alignment::VERTICAL_CENTER,


$xls->getActiveSheet()->setCellValueByColumnAndRow(1, 1, $months[$month-1].' '.$year);


$xls->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $number);


for ($i=0;$i<$breite;$i++) $xls->getActiveSheet()->getColumnDimension($cols[$i])->setAutoSize(true);
header('Content-Type: application/');
header('Content-Disposition: attachment;filename="myfile.xls"');
header('Cache-Control: max-age=0');
$objWriter = PHPExcel_IOFactory::createWriter($xls, 'Excel5');

Thanks a lot for your help