How to merge multiple cells into one

i need to generate an excel report based on the data from database between a date span. the excel file is generated successfuly.

but now i need to give an heading to the file, so need to merge the cells, can anybody tell me is it possible using this package.

thanks

I created a new function in the class, which takes as parameters the array and the number of merged cells.

#--------------

function writeLineMerge($line_arr, $merge){
if($this->state!="OPENED"){
$this->error="Error : Please open the file.";
return false;
}
if(!is_array($line_arr)){
$this->error="Error : Argument is not valid. Supply an valid Array.";
return false;
}
fwrite($this->fp,"<tr>");
foreach($line_arr as $col)
fwrite($this->fp,"<td class=xl24 width=64 colspan=$merge>$col</td>");
fwrite($this->fp,"</tr>");
}
#--------------
It's work!

Try this out to keep CSS support while merging cells:

function writeLineMerge($line_arr, $merge, $css = NULL){
if($this->state != "OPENED"){
$this->error="Error : Please open the file.";
return false;
}
if(!is_array($line_arr)){
$this->error = "Error : Argument is not valid. Supply an valid Array.";
return false;
}
if($css!=NULL)
{
$cssStr = $this->getCssString($css);
}

fwrite($this->fp,"<tr>");
foreach($line_arr as $col)
fwrite($this->fp,"<td class=xl24 width=64 colspan=$merge $cssStr>$col</td>");
fwrite($this->fp,"</tr>");
}