// Add a drawing to the worksheet

$objDrawing = new PHPExcel_Worksheet_Drawing();

$objDrawing->setName('Logo');

$objDrawing->setDescription('Logo');

$objDrawing->setPath('../themes/images/companylogo.png');

$objDrawing->setCoordinates('B2');

$objDrawing->setHeight(120);

$objDrawing->setWidth(120);

$objDrawing->setWorksheet($objPHPExcel->getActiveSheet());