PhpSpreadsheet/tests/data/Calculation/TextData/MID.php

<?php

return [
    [
        '',
        null,
        1,
        1,
    ],
    [
        '',
        '',
        1,
        1,
    ],
    [
        '#VALUE!',
        'QWERTYUIOP',
        -1,
        1,
    ],
    [
        '#VALUE!',
        'QWERTYUIOP',
        5,
        -1,
    ],
    [
        '',
        'QWERTYUIOP',
        5,
    ],
    [
        'IOP',
        'QWERTYUIOP',
        8,
        20,
    ],
    [
        'DEF',
        'ABCDEFGHI',
        4,
        3,
    ],
    [
        'R',
        true,
        2,
        1,
    ],
    [
        'AL',
        false,
        2,
        2,
    ],
];