Spreadsheets, driven by code.

foreach (glob('broken/*.xlsx') as $path) {
    [$spreadsheet, $why] = loadSafely($path);

    if ($spreadsheet === null) {
        printf("%-16s REJECTED  - %s\n", basename($path), $why);
        continue;
    }

    $worksheet = $spreadsheet->getActiveSheet();
    printf(
        "%-16s ACCEPTED  - sheet \"%s\", %d rows, %d columns\n",
        basename($path),
        $worksheet->getTitle(),
        $worksheet->getHighestRow(),
        \PhpOffice\PhpSpreadsheet\Cell\Coordinate::columnIndexFromString($worksheet->getHighestColumn())
    );
}