当我通过config（）获取数组的键时，为什么会更改数组的键？

Question

I have an array of months with keys on config:

return [
    '01' => 'January',
    '02' => 'February',
    '03' => 'March',
    '04' => 'April',
    '05' => 'May',
    '06' => 'June',
    '07' => 'July',
    '08' => 'August',
    '09' => 'September',
    '10' => 'October',
    '11' => 'November',
    '12' => 'December',
];

When I get them by dd(config('months')); the result is:

[
    '01' => 'January',
    '02' => 'February',
    '03' => 'March',
    '04' => 'April',
    '05' => 'May',
    '06' => 'June',
    '07' => 'July',
    '08' => 'August',
    '09' => 'September',
    '0' => 'October',
    '1' => 'November',
    '2' => 'December',
];

Why has this changed? I have no idea...

Answer 1

I assume your input will be the key, but there is in my opinion a simple helper function that can do the same, with help from Carbon.

function getMonth($key) {
    $date = Carbon\Carbon::now();
    $date->setMonth($key);
    return $date->format('F');
}

$month = $this->getMonth('02'); // will return "February"