/**
* By Cleiton Wasen
* wasenbr at gmail.com
* Based in http://www.appservnetwork.com/modules.php?name=News&file=article&sid=8
*
*/
class XlsHelper {

var $helpers = array();

/**
* set the header configuration
* @param $filename the xls file name
*/
function setHeader($filename)
{
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");;
header("Content-Disposition: attachment;filename=$filename");
header("Content-Transfer-Encoding: binary ");
}

/**
* write the xls begin of file
*/
function BOF() {
echo pack("ssssss", 0x809, 0x8, 0x0, 0x10, 0x0, 0x0);
return;
}

/**
* write the xls end of file
*/
function EOF() {
echo pack("ss", 0x0A, 0x00);
return;
}

/**
* write a number
* @param $Row row to write $Value (first row is 0)
* @param $Col column to write $Value (first column is 0)
* @param $Value number value
*/
function writeNumber($Row, $Col, $Value) {
echo pack("sssss", 0x203, 14, $Row, $Col, 0x0);
echo pack("d", $Value);
return;
}

/**
* write a string label
* @param $Row row to write $Value (first row is 0)
* @param $Col column to write $Value (first column is 0)
* @param $Value string value
*/
function writeLabel($Row, $Col, $Value) {
$L = strlen($Value);
echo pack("ssssss", 0x204, 8 + $L, $Row, $Col, 0x0, $L);
echo $Value;
return;
}

}