Sách Giáo Khoa Việt Nam - sachgiaokhoa.org

CodeIgniter 4 website:
- Catalog 999 SGK (lớp 1-12) từ API, lọc theo lớp/môn/NXB, tìm kiếm
- Trang chủ grouped browse (bậc học -> lớp -> môn, ưu tiên môn quan trọng)
- Chi tiết sách: metadata đầy đủ, cover nghệ thuật /thumb/{W}x{H}/
- Đọc online qua gate captcha + countdown, PDF viewer pdf.js
- Download: captcha + token một lần + auto cache-bust version
- Tự đồng bộ catalog/cover khi API thay đổi (refresh:catalog)
- Legal: DMCA, miễn trừ trách nhiệm, điều khoản, bảo mật, liên hệ

public/index.php

@@ -0,0 +1,59 @@
+<?php
+
+use CodeIgniter\Boot;
+use Config\Paths;
+
+/*
+ *---------------------------------------------------------------
+ * CHECK PHP VERSION
+ *---------------------------------------------------------------
+ */
+
+$minPhpVersion = '8.2'; // If you update this, don't forget to update `spark`.
+if (version_compare(PHP_VERSION, $minPhpVersion, '<')) {
+    $message = sprintf(
+        'Your PHP version must be %s or higher to run CodeIgniter. Current version: %s',
+        $minPhpVersion,
+        PHP_VERSION,
+    );
+
+    header('HTTP/1.1 503 Service Unavailable.', true, 503);
+    echo $message;
+
+    exit(1);
+}
+
+/*
+ *---------------------------------------------------------------
+ * SET THE CURRENT DIRECTORY
+ *---------------------------------------------------------------
+ */
+
+// Path to the front controller (this file)
+define('FCPATH', __DIR__ . DIRECTORY_SEPARATOR);
+
+// Ensure the current directory is pointing to the front controller's directory
+if (getcwd() . DIRECTORY_SEPARATOR !== FCPATH) {
+    chdir(FCPATH);
+}
+
+/*
+ *---------------------------------------------------------------
+ * BOOTSTRAP THE APPLICATION
+ *---------------------------------------------------------------
+ * This process sets up the path constants, loads and registers
+ * our autoloader, along with Composer's, loads our constants
+ * and fires up an environment-specific bootstrapping.
+ */
+
+// LOAD OUR PATHS CONFIG FILE
+// This is the line that might need to be changed, depending on your folder structure.
+require FCPATH . '../app/Config/Paths.php';
+// ^^^ Change this line if you move your application folder
+
+$paths = new Paths();
+
+// LOAD THE FRAMEWORK BOOTSTRAP FILE
+require $paths->systemDirectory . '/Boot.php';
+
+exit(Boot::bootWeb($paths));