removeCell

require_once 'classes/CreateXlsx.php';

$xlsx = new CreateXlsxFromTemplate('template.xlsx');

// set the first sheet as the active sheet
$xlsx->setActiveSheet(array('position' => 0));

// remove cells
$xlsx->removeCell('A1');
$xlsx->removeCell('B3');

// set the second sheet as the active sheet
$xlsx->setActiveSheet(array('position' => 1));

// remove cells
$xlsx->removeCell('B5');

$xlsx->saveXlsx('output');

Release notes

phpxlsx 4.0:
- new method.