PHP-Spreadsheet: First Row Bold

Question

Because PHP-Excel is deprecated, PHP-Spreadsheet is the new Option to make Excel in PHP. The Documentation is not the best and the're not many questions on Stackoverflow about PHP-Spreadsheet, so that's why I make this Question about how to make the first row bold in PHP-Spreadsheet.

Answer 1

This should do the trick.

//Create Spreadsheet
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();

//Create Styles Array
$styleArrayFirstRow = [
            'font' => [
                'bold' => true,
            ]
        ];

//Retrieve Highest Column (e.g AE)
$highestColumn = $sheet->getHighestColumn();

//set first row bold
$sheet->getStyle('A1:' . $highestColumn . '1' )->applyFromArray($styleArrayFirstRow);

Answer 2

A more compact way:

//Create Spreadsheet
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();

//Retrieve Highest Column (e.g AE)
$highestColumn = $sheet->getHighestColumn();

$sheet->getStyle('A1:' . $highestColumn . '1' )->getFont()->setBold(true);

The last parameter true will set the bold, as false will unset it from a predefined bold cell / range.