如何在PHP中导出csv文件时着色特定单元格

Question

您好，尝试通过PHP导出csv文件时，对特定的单元格（月份）进行着色和着色/着色。我如何为Month单元着色/着色？

/ open the file "file.csv" for writing
$file = fopen('file.csv', 'w');
// save the column headers
fputcsv($file, array('Month', 'Day Date'));

// save each salary Days to the csv file
foreach($salaryDays as $row){
fputcsv($file, $row);
}
// Close the file
fclose($file);