(PHP 7 >= 7.0.0, PECL xlswriter >= 1.2.1)
Vtiful\Kernel\Excel::addSheet — Vtiful\Kernel\Excel addSheet
$sheetName
   )Create a new worksheet in the xlsx file.
sheetNameWorksheet name
Vtiful\Kernel\Excel instance
Example #1 example
<?php
$config = [
    'path' => './tests'
];
$fileObject  = new \Vtiful\Kernel\Excel($config);
$file = $fileObject->fileName('tutorial.xlsx', 'sheet_one')
    ->header(['name', 'age'])
    ->data([
        ['viest', 23],
        ['wjx', 23]
    ]);
$file->addSheet('sheet_two')
    ->header(['name', 'age'])
    ->data([
        ['james', 33],
        ['king', 33]
    ]);
$file->output();
?>