使用PHPExcel将大文件导出到Excel

($patList是结果列的数组)

set_time_limit ( 3000 );

$cacheMethod = PHPExcel_CachedObjectStorageFactory:: cache_to_phpTemp;

$cacheSettings = array( 'memoryCacheSize' => -1);

PHPExcel_Settings::setCacheStorageMethod($cacheMethod,$cacheSettings);

$objPHPExcel = new PHPExcel();
$i = 1;
$patList = $result[0];

for ($r = 0; $r < count($patList); $r++) {

    $objPHPExcel->setActiveSheetIndex(0)

         ->setCellValue("A$i",$patList[$r][0])
         ->setCellValue("B$i",$patList[$r][1])
         ->setCellValue("C$i",$patList[$r][2])
         ->setCellValue("D$i",$patList[$r][1])
         ->setCellValue("E$i",$patList[$r][2])
         ->setCellValue("F$i",$patList[$r][1])
         ->setCellValue("G$i",$patList[$r][2])
         ->setCellValue("H$i",$patList[$r][2])
         ->setCellValue("I$i",$patList[$r][1])
         ->setCellValue("J$i",$patList[$r][2])
         ->setCellValue("K$i",$patList[$r][5]);
     $i++;
}

$objPHPExcel->getActiveSheet()->setTitle('Name of Sheet 1');

header('Content-Type: application/vnd.ms-excel'); 

header('Content-Disposition: attachment;filename="result.xls"');

header('Cache-Control: max-age=0');

ob_clean();

flush();

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel,'Excel5');

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

如果excel中有3-4列和15,000行,则上面的代码运行正常.但是,如果我增加不.排到30,000或没有.列到10,excel不会生成.