PhpSpreadsheet/tests/data/Calculation/Financial/IRR.php

<?php

// values, guess, Result

return [
    [
        -0.02124484827341,
        [
            -70000,
            12000,
            15000,
            18000,
            21000,
        ],
    ],
    [
        0.086630948036519995,
        [
            -70000,
            12000,
            15000,
            18000,
            21000,
            26000,
        ],
    ],
    [
        -0.1821374641455,
        [
            -70000,
            12000,
            15000,
            18000,
        ],
        0.10000000000000001,
    ],
    [
        -0.13618951095869,
        [
            -100,
            [
                20,
                24,
                28.800000000000001,
            ],
        ],
    ],
    [
        0.13057575637152699,
        [
            -100,
            [
                20,
                24,
                28.800000000000001,
                34.560000000000002,
                41.469999999999999,
            ],
        ],
    ],
];