Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Xls.php
private function readHcenter()
    {
        $length = self::getUInt2d($this->data, $this->pos + 2);
        $recordData = $this->readRecordData($this->data, $this->pos + 4, $length);

        // move stream pointer to next record
        $this->pos += 4 + $length;

        if (!$this->readDataOnly) {
            // offset: 0; size: 2; 0 = print sheet left aligned, 1 = print sheet centered horizontally
            $isHorizontalCentered = (bool) self::getUInt2d($recordData, 0);

            $this->phpSheet->getPageSetup()->setHorizontalCentered($isHorizontalCentered);
        }
    }
private function readHcenter()
    {
        $length = self::getUInt2d($this->data, $this->pos + 2);
        $recordData = $this->readRecordData($this->data, $this->pos + 4, $length);

        // move stream pointer to next record
        $this->pos += 4 + $length;

        if (!$this->readDataOnly) {
            // offset: 0; size: 2; 0 = print sheet left aligned, 1 = print sheet centered horizontally
            $isHorizontalCentered = (bool) self::getUInt2d($recordData, 0);

            $this->phpSheet->getPageSetup()->setHorizontalCentered($isHorizontalCentered);
        }
    }
Read HCENTER record.