header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='$filename);

    echo"GBKheader('ContentType:applicationoctetstream');

    header('ContentDisposition:attachment;filename='

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