Answer by totymedli for How to middle align cell value in PhpSpreadsheet?

Beyond the style array way you can also do it in the method chaining way:

$spreadsheet->getActiveSheet()->getStyle($cells)->getAlignment()->setHorizontal($align)$spreadsheet->getActiveSheet()->getStyle($cells)->getAlignment()->setVertical($align);

• $cells should be a single cell ('A1') or a range of cells ('A1:E4').
• $align should be a constant of the \PhpOffice\PhpSpreadsheet\Style\Alignment class (or its string value) for the desired alignment.
  • for horizontal alignment:
    • Alignment::HORIZONTAL_GENERAL or 'general'
    • Alignment::HORIZONTAL_LEFT or 'left'
    • Alignment::HORIZONTAL_RIGHT or 'right'
    • Alignment::HORIZONTAL_CENTER or 'center'
    • Alignment::HORIZONTAL_CENTER_CONTINUOUS or 'centerContinuous'
    • Alignment::HORIZONTAL_JUSTIFY or 'justify'
    • Alignment::HORIZONTAL_FILL or 'fill'
    • Alignment::HORIZONTAL_DISTRIBUTED or 'distributed' (Excel2007 only)
  • for vertical alignment:
    • Alignment::VERTICAL_BOTTOM or 'bottom'
    • Alignment::VERTICAL_TOP or 'top'
    • Alignment::VERTICAL_CENTER or 'center'
    • Alignment::VERTICAL_JUSTIFY or 'justify'
    • Alignment::VERTICAL_DISTRIBUTED or 'distributed' (Excel2007 only)

The source of these is the source.