first commit

CONTENT/ROOT_URI/Admin/auth.php

@@ -0,0 +1,19 @@
+<?php
+function require_login() {
+    if (session_status() === PHP_SESSION_NONE) {
+        session_start();
+    }
+
+    // Prevent redirect loop for login page
+    $current_path = $_SERVER['REQUEST_URI'];
+    if (strpos($current_path, '/Admin/login') !== false) {
+        return;
+    }
+
+    if (!isset($_SESSION['user_id'])) {
+        error_log("Redirecting to login.php from: $current_path");
+        header("Location: /Admin/login");
+        exit();
+    }
+}
+