Font Style existed but not visible

[responsetech]

Hello,

I have an issue of applying some font style, as you can see the font style existed but it reflected in the attached file. Below is the font style array

$header_style = array(
'borders' => array(
'bottom' => array('style' => PHPExcel_Style_Border::BORDER_MEDIUM),
'right' => array('style' => PHPExcel_Style_Border::BORDER_MEDIUM),
'left' => array('style' => PHPExcel_Style_Border::BORDER_MEDIUM),
'top' => array('style' => PHPExcel_Style_Border::BORDER_MEDIUM),
),
'alignment' => array(
'wrap' => true,
'vertical' => PHPExcel_Style_Alignment::VERTICAL_CENTER,
'horizontal' => PHPExcel_Style_Alignment::HORIZONTAL_CENTER,
),
'font' => array(
'bold' => true,
'size' => 11,
'name' => 'Arial'
),
'fill' => array(
'type' => PHPExcel_Style_Fill::FILL_SOLID,
'color' => array('rgb' => 'D9D9D9')
),
);

and here is the code to apply the style

foreach ($sheet['styles'] as $style) {
$objPHPExcel->getActiveSheet()->getStyle($style['cell'])->applyFromArray($style['style']);
}
PMF xti1j.xlsx