Repeat columns on each printed page

Mark one or more columns as title columns that are repeated on the left of every printed page.

Function Prototype

repeatColumns(string $rangeA1): self

string $rangeA1

A1-style column range.

A single column (e.g. "A") or a closed interval (e.g. "A:C").

An invalid format throws an exception (error code 221).

Example

$config = [
    'path' => './tests'
];

$fileObject = new \Vtiful\Kernel\Excel($config);
$fileObject = $fileObject->fileName('tutorial.xlsx');

$filePath = $fileObject->header(['name', 'age', 'city'])
    ->data([
        ['viest', 21, 'Beijing'],
        ['wjx',   21, 'Shanghai']
    ])
    ->repeatColumns('A:A') // Repeat column A on every printed page
    ->output();