In what ways can PHP forums be optimized for better user experience and navigation?

Issue: PHP forums can be optimized for better user experience and navigation by implementing features such as pagination, search functionality, user-friendly URLs, and responsive design. Code snippet:

// Pagination
$per_page = 10;
$page = isset($_GET['page']) ? $_GET['page'] : 1;
$start = ($page - 1) * $per_page;
$query = "SELECT * FROM posts LIMIT $start, $per_page";

// Search functionality
$search_query = isset($_GET['q']) ? $_GET['q'] : '';
$query = "SELECT * FROM posts WHERE title LIKE '%$search_query%' OR content LIKE '%$search_query%'";

// User-friendly URLs
// Use mod_rewrite in .htaccess file to rewrite URLs
// RewriteRule ^forum/([0-9]+)$ forum.php?id=$1

// Responsive design
// Use CSS media queries to make the forum layout responsive
// Example: @media only screen and (max-width: 600px) {
//              /* Styles for mobile devices */
//          }