шаг 1 сделан

app/helpers.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Core\View;
+
+function app_env(string $key, ?string $default = null): ?string
+{
+    $value = $_ENV[$key] ?? getenv($key);
+
+    if ($value === false || $value === null) {
+        return $default;
+    }
+
+    return (string) $value;
+}
+
+function base_path(string $path = ''): string
+{
+    $base = dirname(__DIR__);
+
+    return $path === '' ? $base : $base . '/' . ltrim($path, '/');
+}
+
+function view(string $template, array $data = []): void
+{
+    View::render($template, $data);
+}