Laravel: convert php-language files to json style

script.php

$files = collect(File::files(resource_path('lang/*')));

function dive(array $curr) {
    $result = [];

    $values = array_values($curr);

    foreach ($values as $value) {
        if (is_array($value)) {
            $result = array_merge($result, dive($value));
            continue;
        }

        $result[$value] = $value;
    }

    return $result;
}
$trans = $files->reduce(function($trans, $file) {
    $folder = basename(dirname($file));
    $translations = require($file);

    if (!array_key_exists($folder, $trans)) {
        $trans[$folder] = [];
    }

    $trans[$folder] = array_merge($trans[$folder], dive($translations));

    return $trans;
}, []);

collect($trans)->each(function($item, $lang) {
    $fileContents = json_encode($item);
    File::put(resource_path('lang/' . $lang . '.json'), $fileContents);
});