Improve session creation

lib/session.php

@@ -2,21 +2,39 @@
 
 class Session
 {
-    const SESSION_LIFETIME = 2678400;
+    const SESSION_LIFETIME = 2678400; // 31 days
 
     public function open($base_path = '/', $save_path = '')
     {
         if ($save_path !== '') session_save_path($save_path);
 
+        // HttpOnly and secure flags for session cookie
         session_set_cookie_params(
             self::SESSION_LIFETIME,
-            $base_path,
+            $base_path ?: '/',
             null,
             isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on',
             true
         );
 
+        // Avoid session id in the URL
+        ini_set('session.use_only_cookies', true);
+
+        // Ensure session ID integrity
+        ini_set('session.entropy_file', '/dev/urandom');
+        ini_set('session.entropy_length', '32');
+        ini_set('session.hash_bits_per_character', 6);
+
+        // Custom session name
+        session_name('__S');
+
         session_start();
+
+        // Regenerate the session id to avoid session fixation issue
+        if (empty($_SESSION['__validated'])) {
+            session_regenerate_id(true);
+            $_SESSION['__validated'] = 1;
+        }
     }
 
     public function close()