Function fr_sanitize_http_url

config/config.php:660–668

Final: env var wins, else fallback Optional: Published URL override (preferred: env, optional: admin config). This is the canonical URL FileRise should advertise (e.g. "https://example.com/fr").

($url)

// Optional: Published URL override (preferred: env, optional: admin config).
// This is the canonical URL FileRise should advertise (e.g. "https://example.com/fr").
function fr_sanitize_http_url($url)
{
    $u = trim((string)$url);
    if ($u === '') return '';
    if (!filter_var($u, FILTER_VALIDATE_URL)) return '';
    $scheme = strtolower(parse_url($u, PHP_URL_SCHEME) ?: '');
    if ($scheme !== 'http' && $scheme !== 'https') return '';
    return $u;
}

function fr_read_admin_config_raw(): array
{