How to set all cells A1

Question

$objActSheet = $objPHPExcel->getActiveSheet();

// Get the current active cell

$objActSheet->getStyle("A1")->getFont( )->setSize(20)->setBold(True);

The question is, how can I set all A1 cells

Answer 1

If I remember correctly

$objActSheet->getStyle("A1:An")->getFont()->setSize(20)->setBold(True);

For example:

$objActSheet->getStyle("A1:A10")->getFont()->setSize(20)->setBold(True);