except remember user, changed all cookies to sessions.

components/nav.php

@@ -9,15 +9,15 @@ $nav = '
           <li><a href="/articles.php?view=sort&sort=newest"' . ($current_page == '/articles.php' ? ' class="underline"' : '') . '>Articles</a></li>
 ';
 
-if (isset($_COOKIE['role_id']) && $_COOKIE['role_id'] <= 2) {
-  $nav .= '
+if (isset($_SESSION['role_id']) && $_SESSION['role_id'] <= 2) {
+    $nav .= '
           <li><a href="/admin.php?view=users"' . ($current_page == '/admin.php' ? ' class="underline"' : '') . '>Admin</a></li>
     ';
 }
 
-if (isset($_COOKIE['user_id'])) {
-  $nav .= '
-          <li><a href="/user.php?view=display&user_id=' . $_COOKIE['user_id'] . '"' . ($current_page == '/user.php' ? ' class="underline"' : '') . '>Account</a></li>
+if (isset($_SESSION['user_id'])) {
+    $nav .= '
+          <li><a href="/user.php?view=display&user_id=' . $_SESSION['user_id'] . '"' . ($current_page == '/user.php' ? ' class="underline"' : '') . '>Account</a></li>
     ';
 }
 
@@ -30,21 +30,21 @@ $nav .= '
 
 $theme_toggle = '';
 if ($_SESSION['theme'] == 'dark')
-  $theme_toggle = 'light';
+    $theme_toggle = 'light';
 else
-  $theme_toggle = 'dark';
+    $theme_toggle = 'dark';
 
 $nav .= '
           <button id="theme_toggle" value="' . $theme_toggle . '" name="theme"><i class="nf ' . ($theme_toggle == 'dark' ? 'nf-oct-moon' : 'nf-oct-sun') . '"></i></button>
         </form>
 ';
 
-if (isset($_COOKIE['username'])) {
-  $nav .= '
+if (isset($_SESSION['username'])) {
+    $nav .= '
         <a href="user.php?view=logout">Log Out</a>
   ';
 } else {
-  $nav .= '
+    $nav .= '
         <a href="user.php?view=login">Login</a>
         <a href="user.php?view=signup">Sign Up</a>
   ';