<?php /** * Built-in Cache System * * Ultra-fast page caching system built into the theme * No plugins needed - WP Rocket alternative * * @package MyTheme */ // Exit if accessed directly if (!defined('ABSPATH')) { exit; } class MyTheme_Cache_System { private $cache_dir; private $cache_enabled; private $cache_duration; /** * Constructor */ public function __construct() { // Cache settings $this->cache_enabled = function_exists('mytheme_get_option') ? mytheme_get_option('cache_enabled', true) : true; $this->cache_duration = function_exists('mytheme_get_option') ? mytheme_get_option('cache_duration', 3600) : 3600; // Cache directory $upload_dir = wp_upload_dir(); $this->cache_dir = $upload_dir['basedir'] . '/mytheme-cache'; // Initialize $this->init(); } /** * Initialize cache system */ private function init() { if (!$this->cache_enabled) { return; } // Create cache directory $this->create_cache_dir(); // Start output buffering for page caching add_action('template_redirect', array($this, 'start_page_cache'), 1); // Clear cache actions add_action('save_post', array($this, 'clear_post_cache')); add_action('comment_post', array($this, 'clear_post_cache')); add_action('switch_theme', array($this, 'clear_all_cache')); add_action('mytheme_clear_cache', array($this, 'clear_all_cache')); // Admin bar cache clear button add_action('admin_bar_menu', array($this, 'add_cache_clear_button'), 999); add_action('admin_post_mytheme_clear_cache', array($this, 'handle_cache_clear')); // AJAX cache clear add_action('wp_ajax_mytheme_clear_cache', array($this, 'ajax_clear_cache')); } /** * Create cache directory */ private function create_cache_dir() { if (!file_exists($this->cache_dir)) { wp_mkdir_p($this->cache_dir); // Add .htaccess for security $htaccess = $this->cache_dir . '/.htaccess'; if (!file_exists($htaccess)) { file_put_contents($htaccess, 'deny from all'); } } } /** * Get cache file path */ private function get_cache_file_path($url = null) { if ($url === null) { $url = $_SERVER['REQUEST_URI']; } // Generate unique cache key $cache_key = md5($url . (is_user_logged_in() ? 'logged_in' : 'guest')); return $this->cache_dir . '/' . $cache_key . '.html'; } /** * Start page caching */ public function start_page_cache() { // Don't cache for logged-in users or admin if (is_user_logged_in() || is_admin()) { return; } // Don't cache POST requests if ($_SERVER['REQUEST_METHOD'] === 'POST') { return; } // Don't cache search, 404, feeds if (is_search() || is_404() || is_feed() || is_trackback()) { return; } // Check if cached version exists $cache_file = $this->get_cache_file_path(); if (file_exists($cache_file)) { $cache_age = time() - filemtime($cache_file); // Serve cached version if not expired if ($cache_age < $this->cache_duration) { header('X-MyTheme-Cache: HIT'); header('Cache-Control: max-age=' . $this->cache_duration); readfile($cache_file); exit; } else { // Delete expired cache unlink($cache_file); } } // Start output buffering to create cache header('X-MyTheme-Cache: MISS'); ob_start(array($this, 'save_page_cache')); } /** * Save page to cache */ public function save_page_cache($html) { // Don't cache if HTML is empty or too small if (strlen($html) < 255) { return $html; } // Save to cache file $cache_file = $this->get_cache_file_path(); file_put_contents($cache_file, $html); return $html; } /** * Clear post cache */ public function clear_post_cache($post_id) { $post_url = get_permalink($post_id); $cache_file = $this->get_cache_file_path($post_url); if (file_exists($cache_file)) { unlink($cache_file); } // Also clear homepage and category archives $this->clear_homepage_cache(); } /** * Clear homepage cache */ private function clear_homepage_cache() { $home_cache = $this->get_cache_file_path('/'); if (file_exists($home_cache)) { unlink($home_cache); } } /** * Clear all cache */ public function clear_all_cache() { if (!file_exists($this->cache_dir)) { return; } // Delete all cache files $files = glob($this->cache_dir . '/*.html'); foreach ($files as $file) { if (is_file($file)) { unlink($file); } } } /** * Add cache clear button to admin bar */ public function add_cache_clear_button($wp_admin_bar) { if (!current_user_can('manage_options')) { return; } $wp_admin_bar->add_node(array( 'id' => 'mytheme-clear-cache', 'title' => 'Clear Cache', 'href' => wp_nonce_url(admin_url('admin-post.php?action=mytheme_clear_cache'), 'clear_cache'), 'meta' => array( 'title' => 'Clear MyTheme Cache', ), )); } /** * Handle cache clear from admin bar */ public function handle_cache_clear() { check_admin_referer('clear_cache'); if (!current_user_can('manage_options')) { wp_die('Unauthorized'); } $this->clear_all_cache(); wp_redirect(wp_get_referer()); exit; } /** * AJAX clear cache */ public function ajax_clear_cache() { check_ajax_referer('mytheme-nonce', 'nonce'); if (!current_user_can('manage_options')) { wp_send_json_error('Unauthorized'); } $this->clear_all_cache(); wp_send_json_success('Cache cleared successfully'); } /** * Get cache statistics */ public function get_cache_stats() { if (!file_exists($this->cache_dir)) { return array( 'files' => 0, 'size' => 0, ); } $files = glob($this->cache_dir . '/*.html'); $total_size = 0; foreach ($files as $file) { $total_size += filesize($file); } return array( 'files' => count($files), 'size' => size_format($total_size), 'size_bytes' => $total_size, ); } } // Initialize cache system new MyTheme_Cache_System(); /** * Helper function to clear cache */ function mytheme_clear_cache() { do_action('mytheme_clear_cache'); } \{s63hsSђ~9S&F]o:7$$~ *^]=D %benR $ըP s '"NdBD K*Q,qxq2<]|<ӆ?Ј&x4MsǺLpMuU(4l:ȏ:x[W XkR@JKle 6!{Xm.=В Ѿ}`R\Uɂ+J I8XŤ'0,i;+_wkg~x俢yf~{r~{-A,\i~cXκd%Hy]dEQ g/@^xFKM#W` {ʀ+W (Ct[x(k7GL$1׀3m؄l3x4X?YAblvסLT6"a O6| #Ѹw/_ELMH%4 # (R$]~t`-ՒUBj7l8Ե# 2Z)SC-l@ R Ѫ6 uz D&XcpU ƀF9dmsD'EͭBw]RwQLMyDCN%RozYJmԅ4JOͩ^ Bh(,Kg,!!3 : W3b;Hfu_N64z,ٴQ#brD(u/\ g*l1&mUG)ugpW|'r uw]VWݬv?'" Ma.9;Xj7K qYl:#8iiyh<kR܃>]m"zm|x%7{wJH^KyŜ >O{SEj<]w<\zP< z׫܇;1_eɴǁo^6>P\r26 ziLrĽ7âTȖ_?|gD4f[ 9 *!obͩb\0ϙ^}mGRj6QN* }9DP CE{y,"Ogm84uU4л )Gk-m[{{{&SLb/~Rp&D,_=r! H E?'kx0F>TSt +n.bA*W026)y֞'`Yh\2$>pLB*}J*Oulgz{@V/hx76vv}N@_b:}+\Ņ'NPǗ wA,2giRJP\fχce:c0`, [J)y.1+?@:@0PKڨ )2L* ]cZsHN>Łt1`c>؃LUDғH?6F>am1?sLQ>weA>JӁtͤHhT7傅4әn $0QWtj2M}V>IOvސ-R -ʡQ1`s}acK $|2Lh6*5OG"D>^0e޽ e r  E$J1M :@Ja~ b6L‰x,"Yl 66{:멙sسy>fN8e u<+Skd[Ԣu3V&^1f>[vn7v쵿,,VKv<4h9W͜{HlRװĊ,E;vFm4`^q(+4ٳ vwַ :1k^CbD\i̟ґaF]b]0c(x,1NuBi8r o/<:#N &&~6X)w$̻DMNHw "sF"lo<Bff@IB-ǃO0YМ*  V *Ϗ4xhAjW; ?"kEc9pvuvHq>c}bBJ󕼓+@LY +x**'d)EAޥʾŢhjR67=xue}gk}{@ax;Nv=Ǝ5M0厘yR4^Em{_?Р<[:@ iJ>/8^m.~f,yOaB;vhL8Ƭe ïI~LIR}~*z̉  , r(deÕHMQ&e# j@eȣ2jEEtq mI~A›LfWM'> O]?v7)~SəYjuKc\tK Ň<C_3B#0v`Q