docket-cache / includes / src / Becache.php

Becache.php in Docket Cache – Object Cache Accelerator 22.07.01, at includes/src/Becache.php

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1	<?php
2	/**
3	* Docket Cache.
4	*
5	* @author Nawawi Jamili
6	* @license MIT
7	*
8	* @see https://github.com/nawawi/docket-cache
9	*/
10
11	/*
12	* This class is a minimal version of cache.php, only use for object-cache.php.
13	*
14	* Reference:
15	* wp-content/plugins/docket-cache/includes/cache.php
16	* wp-content/plugins/docket-cache/includes/object-cache.php
17	*/
18
19	namespace Nawawi\DocketCache;
20
21	\defined('ABSPATH') \|\| exit;
22
23	class Becache
24	{
25	private $cache_path;
26	private $cache_maxsize = 3145728;
27	private $cache_maxttl = 345600;
28	private $multisite = false;
29	private $blog_prefix;
30	private $qlimit = 5000;
31	private static $inst;
32	private $max_execution_time = 0;
33
34	public function __construct()
35	{
36	$this->multisite = \function_exists('is_multisite') && is_multisite();
37	$this->blog_prefix = $this->switch_to_blog(get_current_blog_id());
38
39	$this->cache_path = $this->fs()->define_cache_path($this->cf()->dcvalue('PATH'));
40	if (\function_exists('is_multisite') && is_multisite()) {
41	$this->cache_path = nwdcx_network_dirpath($this->cache_path);
42	}
43
44	if ($this->cf()->is_dcint('MAXSIZE', $dcvalue)) {
45	if (!empty($dcvalue)) {
46	$this->cache_maxsize = $this->fs()->sanitize_maxsize($dcvalue);
47	}
48	}
49
50	if ($this->cf()->is_dcint('MAXTTL', $dcvalue)) {
51	if (!empty($dcvalue)) {
52	$this->cache_maxttl = $this->fs()->sanitize_maxttl($dcvalue);
53	}
54	}
55
56	$this->max_execution_time = $this->fs()->get_max_execution_time();
57	}
58
59	public static function export()
60	{
61	if (!isset(self::$inst)) {
62	self::$inst = new self();
63	}
64
65	self::$inst->export_transient();
66	self::$inst->export_alloptions();
67	}
68
69	private function fs()
70	{
71	static $inst;
72	if (!\is_object($inst)) {
73	$inst = new Filesystem();
74	}
75
76	return $inst;
77	}
78
79	private function cf()
80	{
81	static $inst;
82	if (!\is_object($inst)) {
83	$inst = new Constans();
84	}
85
86	return $inst;
87	}
88
89	private function cache_key($key, $group)
90	{
91	if ($this->multisite && 'site-transient' === $group) {
92	$key = $this->blog_prefix.$key;
93	}
94
95	return $key;
96	}
97
98	private function item_hash($str, $length = 12)
99	{
100	if (empty($length)) {
101	return md5($str);
102	}
103
104	return substr(md5($str), 0, $length);
105	}
106
107	private function get_file_path($key, $group)
108	{
109	$hash_group = $this->item_hash($group);
110	$hash_key = $this->item_hash($key);
111
112	$index = $hash_group.'-'.$hash_key;
113
114	if ($this->cf()->is_dcfalse('CHUNKCACHEDIR')) {
115	return $this->cache_path.$index.'.php';
116	}
117
118	$chunk_path = $this->fs()->get_chunk_path($hash_group, $hash_key);
119
120	return $this->cache_path.$chunk_path.$index.'.php';
121	}
122
123	private function dump_code($file, $arr)
124	{
125	$data = $this->fs()->export_var($arr, $error);
126	if (false === $data) {
127	return false;
128	}
129
130	$code = $this->fs()->code_stub($data);
131	$stat = $this->fs()->dump($file, $code, false);
132
133	if (false === $stat) {
134	return false;
135	}
136
137	if (-1 === $stat) {
138	return false;
139	}
140
141	$this->fs()->validate_fatal_error_file($file);
142
143	return $stat;
144	}
145
146	private function maybe_expire($group, $expire = 0, $key = '')
147	{
148	if (empty($expire)) {
149	$expire = 0;
150	}
151
152	$expire = $this->fs()->sanitize_timestamp($expire);
153	$maxttl = $this->cache_maxttl;
154
155	if (0 === $expire && $maxttl < 2419200) {
156	if ($this->fs()->is_transient($group)) {
157	if ('site-transient' === $group && \in_array($key, ['update_plugins', 'update_themes', 'update_core', '_woocommerce_helper_updates'])) {
158	$expire = $maxttl < 2419200 ? 2419200 : $maxttl; // 28d
159	} elseif ('transient' === $group && 'health-check-site-status-result' === $key) {
160	$expire = 0; // to check with is_data_uptodate
161	} else {
162	$expire = $maxttl < 604800 ? 604800 : $maxttl; // 7d
163	}
164	} elseif (\in_array($group, ['terms', 'posts', 'post_meta', 'options', 'site-options', 'comments'])) {
165	$expire = $maxttl < 1209600 ? 1209600 : $maxttl; // 14d
166
167	// woocommerce stale cache
168	// wc_cache_0.72953700 1651592702
169	} elseif ('wc_cache_' === substr($key, 0, 9) && preg_match('@^wc_cache_([0-9\. ]+)_@', $key)) {
170	$expire = 86400; // 1d
171	}
172	}
173
174	return $expire;
175	}
176
177	private function store_cache($key, $data, $group, $expire = 0)
178	{
179	if (!$this->fs()->mkdir_p($this->cache_path)) {
180	return false;
181	}
182
183	$expire = $this->maybe_expire($group, $expire, $key);
184
185	$cache_key = $this->cache_key($key, $group);
186	$file = $this->get_file_path($cache_key, $group);
187
188	// chunk dir
189	if ($this->cf()->is_dctrue('CHUNKCACHEDIR') && !$this->fs()->mkdir_p(\dirname($file))) {
190	return false;
191	}
192
193	$timeout = ($expire > 0 ? time() + $expire : 0);
194
195	$type = \gettype($data);
196	if ('NULL' === $type && null === $data) {
197	$data = '';
198	}
199
200	if (!empty($data)) {
201	if ('string' === $type) {
202	$data = nwdcx_unserialize($data);
203	} elseif ('array' === $type) {
204	$data_r = nwdcx_arraymap('nwdcx_unserialize', $data);
205
206	if (!empty($data_r)) {
207	$data = $data_r;
208	}
209	unset($data_r);
210	}
211	}
212
213	$len = \strlen(serialize($data));
214	if ($len >= $this->cache_maxsize) {
215	return false;
216	}
217
218	$meta = [];
219	$meta['timestamp'] = time();
220
221	if ($this->multisite) {
222	try {
223	$meta['network_id'] = get_current_network_id();
224	} catch (\Throwable $e) {
225	$meta['network_id'] = 0;
226	}
227	}
228
229	$final_type = \gettype($data);
230	if ('array' === $final_type) {
231	// http remote request
232	// headers => Requests_Utility_CaseInsensitiveDictionary Object
233	if (!empty($data['headers']) && \is_object($data['headers']) && false !== strpos(var_export($data['headers'], 1), 'Requests_Utility_CaseInsensitiveDictionary::__set_state')) {
234	$data = @serialize($data);
235	if (nwdcx_serialized($data)) {
236	$final_type = 'string';
237	}
238	}
239	}
240
241	$meta['site_id'] = get_current_blog_id();
242	$meta['group'] = $group;
243	$meta['key'] = $cache_key;
244	$meta['type'] = $final_type;
245	$meta['timeout'] = $timeout;
246	$meta['data'] = $data;
247
248	if (true === $this->dump_code($file, $meta)) {
249	return true;
250	}
251
252	return false;
253	}
254
255	public function export_transient()
256	{
257	if (!nwdcx_wpdb($wpdb)) {
258	return false;
259	}
260
261	$suppress = $wpdb->suppress_errors(true);
262	$collect = [];
263
264	$results = $wpdb->get_results('SELECT `option_id`,`option_name`,`option_value` FROM `'.$wpdb->options.'` WHERE `option_name` LIKE "_transient_%" OR `option_name` LIKE "_site_transient_%" ORDER BY `option_id` ASC LIMIT '.$this->qlimit, ARRAY_A);
265	if (!empty($results) && \is_array($results)) {
266	while ($row = @array_shift($results)) {
267	if ($this->max_execution_time > 0 && \defined('WP_START_TIMESTAMP') && (microtime(true) - WP_START_TIMESTAMP) > $this->max_execution_time) {
268	$collect = [];
269	break;
270	}
271
272	// ignore empty value
273	if ('' === $row['option_value']) {
274	continue;
275	}
276
277	$key = @preg_replace('@^(_site)?(_transient)(_timeout)?_@', '', $row['option_name']);
278	if (!isset($collect[$key])) {
279	$collect[$key] = ['value' => '', 'group' => 'transient', 'timeout' => 0];
280	}
281
282	$collect[$key]['value'] = $row['option_value'];
283	if ('_site_' === substr($row['option_name'], 0, 6)) {
284	$collect[$key]['group'] = 'site-transient';
285	}
286
287	if (false !== strpos($row['option_name'], '_transient_timeout_')) {
288	$collect[$key]['timeout'] = (int) $row['option_value'];
289	}
290	}
291
292	if (!empty($collect)) {
293	foreach ($collect as $key => $arr) {
294	if ($this->max_execution_time > 0 && \defined('WP_START_TIMESTAMP') && (microtime(true) - WP_START_TIMESTAMP) > $this->max_execution_time) {
295	break;
296	}
297
298	$timeout = isset($arr['timeout']) ? $arr['timeout'] : 0;
299	$this->store_cache($key, $arr['value'], $arr['group'], $timeout);
300	}
301	}
302	}
303
304	$collect = [];
305
306	if ($this->multisite && isset($wpdb->sitemeta)) {
307	$results = $wpdb->get_results('SELECT `meta_id`,`meta_key`,`meta_value` FROM `'.$wpdb->sitemeta.'` WHERE `meta_key` LIKE "_site_transient_%" ORDER BY `meta_id` ASC LIMIT '.$this->qlimit, ARRAY_A);
308	if (!empty($results) && \is_array($results)) {
309	while ($row = @array_shift($results)) {
310	if ($this->max_execution_time > 0 && \defined('WP_START_TIMESTAMP') && (microtime(true) - WP_START_TIMESTAMP) > $this->max_execution_time) {
311	$collect = [];
312	break;
313	}
314
315	// ignore empty value
316	if ('' === $row['meta_value']) {
317	continue;
318	}
319
320	$key = @preg_replace('@^(_site)?(_transient)(_timeout)?_@', '', $row['meta_key']);
321	if (!isset($collect[$key])) {
322	$collect[$key] = ['value' => '', 'group' => 'site-transient', 'expire' => 0];
323	}
324
325	$collect[$key]['value'] = $row['meta_value'];
326
327	if (false !== strpos($row['meta_key'], '_site_transient_timeout_')) {
328	$collect[$key]['timeout'] = (int) $row['meta_value'];
329	}
330	}
331
332	if (!empty($collect)) {
333	foreach ($collect as $key => $arr) {
334	$timeout = isset($arr['timeout']) ? $arr['timeout'] : 0;
335	$this->store_cache($key, $arr['value'], $arr['group'], $timeout);
336	}
337	}
338	}
339	}
340
341	unset($collect, $results);
342	$wpdb->suppress_errors($suppress);
343
344	return true;
345	}
346
347	public function export_alloptions()
348	{
349	if (!nwdcx_wpdb($wpdb) \|\| $this->multisite) {
350	return false;
351	}
352
353	$suppress = $wpdb->suppress_errors(true);
354	$alloptions_db = $wpdb->get_results('SELECT `option_name`,`option_value` FROM `'.$wpdb->options.'` WHERE autoload = \'yes\'', ARRAY_A);
355	if (empty($alloptions_db)) {
356	$alloptions_db = $wpdb->get_results('SELECT `option_name`,`option_value` FROM `'.$wpdb->options.'`', ARRAY_A);
357	}
358	$wpdb->suppress_errors($suppress);
359
360	$alloptions = [];
361
362	if (!empty($alloptions_db) && \is_array($alloptions_db)) {
363	$wp_options = $this->fs()->keys_alloptions();
364	$is_filter = $this->cf()->is_dctrue('WPOPTALOAD');
365	foreach ($alloptions_db as $num => $options) {
366	if ($this->max_execution_time > 0 && \defined('WP_START_TIMESTAMP') && (microtime(true) - WP_START_TIMESTAMP) > $this->max_execution_time) {
367	$alloptions = [];
368	break;
369	}
370
371	$key = $options['option_name'];
372	if ($is_filter && \array_key_exists($key, $wp_options)) {
373	continue;
374	}
375	$alloptions[$key] = $options['option_value'];
376	}
377
378	if (!empty($alloptions)) {
379	$this->store_cache('alloptions', $alloptions, 'options');
380	}
381	}
382
383	unset($alloptions, $alloptions_db);
384
385	// always true
386	return true;
387	}
388
389	private function switch_to_blog($blog_id)
390	{
391	$blog_id = (int) $blog_id;
392	$this->blog_prefix = $this->multisite ? $blog_id.':' : '';
393	}
394	}
395