jQuery Grid Plugin - jqGrid

I've read a lot of posts here and around the web from people having problems getting excelExport working in a regular installation of jqGrid. Count me in that group. Part of the problem may be the lack of a really good example. I am using jqGrid 3.8.2 and am desperately looking for a working example of the code on the processing page. I already have the grid and Export to Excel button setup and working. Here is my button code:

jQuery("#sample").jqGrid('navButtonAdd','#pager',{

caption:"Export to Excel", 

onClickButton: function () {

jQuery("#sample").jqGrid('excelExport', { url: 'ExportExcel.php'});      

}

});

I need the code for the ExportExcel.php page.

Thanks.