Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Html.php
private function createCSSStyleAlignment(Alignment $pStyle)
    {
        // Construct CSS
        $css = [];

        // Create CSS
        $css['vertical-align'] = $this->mapVAlign($pStyle->getVertical());
        if ($textAlign = $this->mapHAlign($pStyle->getHorizontal())) {
            $css['text-align'] = $textAlign;
            if (in_array($textAlign, ['left', 'right'])) {
                $css['padding-' . $textAlign] = (string) ((int) $pStyle->getIndent() * 9) . 'px';
            }
        }

        return $css;
    }
private function createCSSStyleAlignment(Alignment $pStyle)
    {
        // Construct CSS
        $css = [];

        // Create CSS
        $css['vertical-align'] = $this->mapVAlign($pStyle->getVertical());
        if ($textAlign = $this->mapHAlign($pStyle->getHorizontal())) {
            $css['text-align'] = $textAlign;
            if (in_array($textAlign, ['left', 'right'])) {
                $css['padding-' . $textAlign] = (string) ((int) $pStyle->getIndent() * 9) . 'px';
            }
        }

        return $css;
    }
Create CSS style (\PhpOffice\PhpSpreadsheet\Style\Alignment).

@param Alignment $pStyle \PhpOffice\PhpSpreadsheet\Style\Alignment

@return array