title: Creating large Excel files with PHPExcel
body: <p>I am trying to create some very large excel documents with PHPExcel however I don't want to have to increase the memory limit within PHP.  </p>
  
  <p>Would it be possible to have it write say 100 rows at a time and then save it to disk.  That way the whole document doesn't need to be stored in memory.<br>
  I am based in AWS so I was thinking of using S3 to store the temporary spreadsheet before it is completed and downloaded to the users computer.</p>
  
  <p>If someone has experience with this method and could provide some guidance that would be great.</p>