How to download data to excel file?

Hello everyone! How do you write a PHP function in codeigniter that lets user download data to an Excel file?


Thank You.

http://www.the-art-of-web.com/php/dataexport/

<?PHP function cleanData(&$str)
{
$str = preg_replace("/\t/", "\\t", $str);
$str = preg_replace("/\r?\n/", "\\n", $str);
if(strstr($str, '"')) $str = '"' . str_replace('"', '""', $str) . '"';
}
# filename for download
$filename = "website_data_" . date('Ymd') . ".xls";
header("Content-Disposition: attachment; filename=\"$filename\"");
header("Content-Type: application/vnd.ms-excel");
$flag = false;
foreach($data as $row)
{
if(!$flag)
{
# display field/column names as first row
echo implode("\t", array_keys($row)) . "\r\n";
$flag = true;
}
array_walk($row, 'cleanData');
echo implode("\t", array_values($row)) . "\r\n";
}
exit;
?>

web development services (http://www.prodigyapex.com)