layout

includes/auth.php

@@ -0,0 +1,19 @@
+<?php
+// includes/auth.php
+
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+
+function require_login(string $redirectTarget = null): void
+{
+    if (!isset($_SESSION['user'])) {
+        if ($redirectTarget === null) {
+            $redirectTarget = $_SERVER['REQUEST_URI'] ?? '/index.php';
+        }
+
+        $redirect = urlencode($redirectTarget);
+        header("Location: /login.php?redirect=$redirect");
+        exit;
+    }
+}