PhpSpreadsheet/tests/data/Calculation/MathTrig/ROMAN.php

<?php

return [
    [
        'XLIX',
        49,
    ],
    [
        'L',
        50,
    ],
    [
        'MMXII',
        2012,
    ],
    [
        'CMXCIX',
        999,
    ],
    [
        'CDXCIX',
        499,
    ],
    [
        'MMXVIII',
        2018,
    ],
];