0012/config/bootstrap.php

<?php

declare(strict_types=1);

/**
 * Load configuration from private/.env (outside document root).
 * Called from httpdocs/*.php via require on private/config/bootstrap.php.
 */

function bootstrap(): array
{
    static $config = null;

    if ($config !== null) {
        return $config;
    }

    $envFile = dirname(__DIR__) . '/.env';
    $config = loadEnvFile($envFile);

    return $config;
}

function env(string $key, ?string $default = null): ?string
{
    $value = bootstrap()[$key] ?? null;

    return ($value === null || $value === '') ? $default : $value;
}

function loadEnvFile(string $path): array
{
    if (!is_readable($path)) {
        return [];
    }

    $vars = [];

    foreach (file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) as $line) {
        $line = trim($line);

        if ($line === '' || str_starts_with($line, '#')) {
            continue;
        }

        if (!str_contains($line, '=')) {
            continue;
        }

        [$key, $value] = explode('=', $line, 2);
        $vars[trim($key)] = trim($value);
    }

    return $vars;
}

function privateDataDir(): string
{
    return dirname(__DIR__) . '/data';
}