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Editorial Team
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Asked: 2026-05-31T05:48:55+00:00

In using PHP to output an Excel file, it is working fine, however, each

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In using PHP to output an Excel file, it is working fine, however, each Excel file has 3 blank rows at the top. The headers are such:

<?php
header ("Expires: Mon, 28 Oct 2008 05:00:00 GMT");
header ("Last-Modified: " . gmdate("D,d M YH:i:s") . " GMT");
header ("Cache-Control: no-cache, must-revalidate");
header ("Pragma: no-cache");
header ("Content-type: application/vnd.ms-excel");
header ("Content-Disposition: attachment; filename=\"GridExport.xls" );
header ("Content-Description: Generated Report" );
echo $content_for_layout;
?>

In looking at the 3 blank rows in a text editor such as notepad, I actually see one blank row, following by a row with a single space, following by another blank row, so that is basically equivalent to:

\n.\n\n

where the period = single space.

Finally, when I do open the file in Excel > 2003, I get this error message about the file not being in the right format, yet clicking yes opens it fine (minus the 3 blank row problem). Is it possible to send the right headers to not get this message? See a screenshot at:

https://twiki.auscope.org/wiki/pub/Grid/WfsReaderWs/OpenFileWarning.png

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1 Answer

  1. Editorial Team

    If you output CVS with an XLS extension Excel 2007 and above will give you a warning that it isn’t an excel file, but open it anyway. Earlier versions will not give that warning.
    Outputing it correctly as a CSV file will not cause that error, or prevent other CVS handling applications from handling it.

    As to what the lines are – impossible to tell without knowing what is in $content_for_layout

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