phpspreadsheet 導入 excel 表

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;

public function importExecl(string $file = '', int $sheet = 0, int $columnCnt = 0, &$options = [])
    {
        $spreadsheet = new Spreadsheet();
        /** @var Xlsx $objRead */
        $objRead     = IOFactory::createReader('Xlsx');
        /* 如果不需要獲取特殊操作，則只讀內容，可以大幅度提升讀取Excel效率 */
        empty($options) && $objRead->setReadDataOnly(true);
        /* 建立excel對象 */
        $spreadsheet        = $objRead->load($file); //載入excel表格
        $worksheet          = $spreadsheet->getActiveSheet(); //讀取第一張表,獲取指定的sheet表
        $highestRow         = $worksheet->getHighestRow();    //獲取總行數
        $highestColumn      = $worksheet->getHighestColumn(); //獲取總列數
        $highestColumnIndex = Coordinate::columnIndexFromString($highestColumn); //兼容原邏輯，循環時使用的是小於等於
        $import_data        = [];
        $lines              = $highestRow - 2;
        if ($lines <= 0) {
            dump('Excel表格中沒有數據');
        }
        if (0 == $columnCnt) {
            /* 取得最大的列號 */
            $highestColumn = $worksheet->getHighestColumn();
            /* 兼容原邏輯，循環時使用的是小於等於 */
            $columnCnt     = Coordinate::columnIndexFromString($highestColumn);
        }
        /* 讀取數據 */
        for ($_row = 2; $_row <= $highestRow; $_row++) {
            $isNull      = true;
            $import_data = [];
            for ($_column = 1; $_column <= $columnCnt; $_column++) {
                $cellName = Coordinate::stringFromColumnIndex($_column);
                $cellId   = $cellName . $_row;
                $cell     = $worksheet->getCell($cellId);
                $import_data[$_row][$cellName] = trim($worksheet->getCell($cellId)->getFormattedValue());
                if (!empty($import_data[$_row][$cellName])) {
                    $isNull = false;
                }
            }
            dump($import_data);
            });            
            // $import_data = [];
            /* 判斷是否整行數據爲空，是的話刪除該行數據 */
            if ($isNull) {
                unset($import_data[$_row]);
            }
            unset($import_data);
        }
    }