<!–?php &lt;br ?–> // Check if _page is set
if (isset($_GET['_page'])) {
// Convert to integer (removes harmful input)
$page = intval($_GET['_page']);
// If value is invalid or less than 1, set default
if ($page &lt;= 0) { $page = 1; } } else { $page = 1; // Default value } // Display safe value echo "Sanitized Page Number: " . $page; ?&gt;