autenticazione/App/Models/Storage.php

<?php

namespace MwgAuth\Models;

use MwgAuth\Core\Model;

class Storage extends Model
{
    public static function fileGetContents(string $fileName): ?string
    {
        $fullName = self::getFullName($fileName);
        if (file_exists($fullName)) {
            return file_get_contents($fullName);
        }
        return null;
    }

    public static function filePutContents(string $fileName, string $data, int $flags = 0)
    {
        $fullName = self::getFullName($fileName);
        $umask = umask(0);
        mkdir(dirname($fullName), 0777, true);
        file_put_contents($fullName, $data, $flags);
        umask($umask);
    }

    private static function getFullName(string $fileName): string
    {
        return $_SERVER['DOCUMENT_ROOT'] . '/storage/' . $fileName;
    }
}