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xSpeed Cache: AI-Powered Performance Hub with MCP, Caching & CDN / 1.3.7
xSpeed Cache: AI-Powered Performance Hub with MCP, Caching & CDN v1.3.7
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xspeed / includes / class-plugin.php

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1 <?php
2 /**
3 * Main plugin bootstrap.
4 *
5 * @package XSpeed
6 */
7
8 namespace XSpeed;
9
10 defined( 'ABSPATH' ) || exit;
11
12 class Plugin {
13
14 /**
15 * Data-schema version for one-time migrations, independent of the
16 * plugin version header. Bump when adding a step to maybe_upgrade().
17 */
18 public const DATA_VERSION = '1.3.6';
19
20 private static $instance = null;
21
22 /** @var Usage_Tracker|null */
23 private $usage_tracker = null;
24
25 public static function instance() {
26 if ( null === self::$instance ) {
27 self::$instance = new self();
28 }
29 return self::$instance;
30 }
31
32 public function init() {
33 // v1 services that are NOT yet wrapped as Modules (Admin, Rest_Api,
34 // Cache, Onboarding) are instantiated directly. Minifier is now
35 // instantiated by MinifyModule::boot(); Gzip is purely static.
36 new Admin();
37 new Rest_Api();
38 new Cache();
39 new Rest_Cache();
40 new Onboarding();
41
42 // Optional deactivation feedback survey on the Plugins screen. Admin
43 // context only (its hooks are admin_enqueue_scripts / admin_footer /
44 // wp_ajax). Sends nothing unless the user clicks "Submit & Deactivate".
45 if ( is_admin() ) {
46 new Deactivation_Feedback();
47 }
48
49 // Opt-in usage analytics. Instantiating + init() only registers the
50 // cron callback; NOTHING is collected or sent until the admin opts in
51 // from the setup wizard (Onboarding wires the consent toggle to
52 // Usage_Tracker::opt_in()). See class-usage-tracker.php privacy contract.
53 $this->start_plugin_tracking();
54
55 // Auto-heal the cache drop-in + WP_CACHE constant when state
56 // drifts. Scoped to admin_init only: filesystem writes belong in
57 // an authenticated admin context, never on anonymous front-end
58 // requests. The user already opted in (cache_enabled=true) —
59 // this is a consistency check, not a new install path. First
60 // admin page load after a plugin upgrade restores the state;
61 // front-end then serves from cache on the next request.
62 add_action( 'admin_init', array( Cache::class, 'auto_heal' ) );
63 // Cheap: returns immediately unless the stored schema version is
64 // behind. Covers updates and multisite, where activate() never runs.
65 add_action( 'admin_init', array( Score_Store::class, 'maybe_install' ) );
66
67 // Secondary net: restore as soon as an update completes, for the
68 // cases where activate() does not re-run (bulk updates, auto-updates,
69 // some host updaters). Best-effort by nature — this callback is only
70 // registered when we were loaded in the request performing the
71 // update, which is not guaranteed while WE are the plugin being
72 // replaced. The restore in activate() is the primary guarantee;
73 // auto_heal() on admin_init remains the backstop.
74 add_action( 'upgrader_process_complete', array( $this, 'maybe_restore_after_update' ), 10, 2 );
75
76 // Per-post cache rules (Phase 3.4) — registers postmeta with
77 // REST + meta box on edit screens.
78 Cache_Meta_Box::boot();
79
80 // Single-URL purge entry points — row actions, the edit-screen
81 // button and the admin-post handler the admin-bar item also uses.
82 Purge_Ui::boot();
83
84 // Phase 0 architecture — managers + Free modules. v1 services
85 // (Cache/Minifier/Gzip) are NOT yet Modules; they'll be refactored
86 // in a follow-up PR with parity tests.
87 Conflict_Registry::boot();
88
89 // Read-only page-cache ownership evidence, behind the same
90 // activation/deactivation invalidation as the conflict matrix.
91 Page_Cache_Detector::boot();
92
93 // Integrations that clear OTHER plugins' caches of rendered output
94 // (Elementor's element cache + generated CSS). Registers a listener
95 // only; nothing runs until Cache::purge_render_caches() asks.
96 Render_Caches::boot();
97 // Forwarding needs no boot(): Cache::dispatch_purge_event() calls
98 // Server_Caches::forward() directly so a throwing third-party listener
99 // cannot skip it. Both built-in server-cache adapters live behind it —
100 // LiteSpeed, and the nginx FastCGI cache reached through the host's
101 // Nginx Helper install (Host_Page_Caches), which is why neither is
102 // booted here. This boot() registers one listener only: the single
103 // purge that runs after an import, which the nginx adapter's import
104 // gate stands down in favour of.
105 Server_Caches::boot();
106
107 // Tell WP Statistics and Slimstat not to count the warmer, the
108 // benchmark and the verifier as visitors. Record-time filters only;
109 // see the class for why the tracking snippet itself is left alone.
110 Self_Traffic::boot();
111
112 // Register Free modules via the same action xspeed-pro uses, so
113 // the bootstrap path is symmetric across tiers.
114 add_action( 'xspeed_register_modules', array( $this, 'register_free_modules' ) );
115
116 // Fire the registration action + boot the registry at a LATER
117 // plugins_loaded priority so add-on plugins (xspeed-pro, in
118 // alphabetical order so it runs at default priority 10 AFTER
119 // us, but any add-on loaded at plugins_loaded(< 20)) have a
120 // chance to register their `xspeed_register_modules` callback
121 // before we fire the action.
122 //
123 // Bug history: previously this fired inline from init() at
124 // priority 10. xspeed-pro's plugins_loaded(15) hook then added
125 // its register_pro_modules callback AFTER the action had
126 // already fired — Pro modules never appeared in the registry.
127 // Caught by the ProStatus sentinel module's integration test.
128 add_action( 'plugins_loaded', array( $this, 'fire_module_lifecycle' ), 20 );
129
130 // One-time data migrations keyed on the stored version. Runs in
131 // admin only — nothing here needs to touch a front-end request.
132 if ( is_admin() ) {
133 add_action( 'plugins_loaded', array( $this, 'maybe_upgrade' ), 21 );
134 }
135 }
136
137 /**
138 * Add the 1.3.6 tracking params to a saved ignored-params list.
139 *
140 * Only those names, and only when missing: anything else the site
141 * removed stays removed. A site with no saved list already reads the new
142 * defaults.
143 */
144 public static function add_new_ignored_params(): void {
145 $option = Settings_Manager::OPTION_PREFIX . 'cache';
146 $stored = get_option( $option, array() );
147 if ( ! is_array( $stored ) || ! is_array( $stored['ignored_query_params'] ?? null ) ) {
148 return;
149 }
150 $list = $stored['ignored_query_params'];
151 // An empty list is a choice: every query string bypasses the cache.
152 if ( empty( $list ) ) {
153 return;
154 }
155 $missing = array_values( array_diff( \XSpeed\Modules\Cache\CacheModule::TRACKING_PARAMS_1_3_6, $list ) );
156 if ( empty( $missing ) ) {
157 return;
158 }
159 $stored['ignored_query_params'] = array_merge( $list, $missing );
160 update_option( $option, $stored );
161 // The drop-in keeps its own copy of the list next to the cache.
162 if ( defined( 'XSPEED_CACHE_DIR' ) ) {
163 Cache::sync_query_allowlist();
164 }
165 }
166
167 /**
168 * Run version-gated data migrations exactly once per upgrade.
169 *
170 * Keyed on `xspeed_data_version` rather than the plugin version header
171 * so a migration can be added without forcing a release bump.
172 */
173 public function maybe_upgrade(): void {
174 $current = (string) get_option( 'xspeed_data_version', '0' );
175 if ( version_compare( $current, self::DATA_VERSION, '>=' ) ) {
176 return;
177 }
178
179 // Each step runs once, for the version that needs it. They used to
180 // run on every bump, which would purge every site's static tree again
181 // for a migration that has nothing to do with it.
182
183 // 1.1.2 — strip credential values recorded by earlier versions'
184 // settings change annotations (they're served by the trend endpoints).
185 if ( version_compare( $current, '1.1.2', '<' ) ) {
186 Activity_Log::redact_legacy_secrets();
187 }
188
189 // 1.1.4 — earlier versions cached a failed loopback as "gzip is not
190 // active" for an hour, which showed up as a bogus server-config
191 // warning. Drop the stale answer so the fixed probe re-runs instead
192 // of the wrong verdict living on past the update (issue #18).
193 if ( version_compare( $current, '1.1.4', '<' ) ) {
194 delete_transient( 'xspeed_gzip_active' );
195 }
196
197 // 1.1.6 — a `/?s=<term>` request used to write its results page into
198 // the static tree under the *searched-from* path, which for the usual
199 // query-form search is `/`. The web server then served that results
200 // page as the homepage to every visitor. The write is fixed in
201 // Cache::store_static(), but an entry poisoned before the update
202 // outlives it: nothing purges on upgrade, and the static serve path
203 // never revalidates. Clear the tree once. The flat cache is keyed
204 // correctly and is deliberately left alone. (issue #191)
205 if ( version_compare( $current, '1.1.6', '<' ) ) {
206 Cache::purge_static_tree();
207 }
208
209 // 1.3.6 — new click and campaign IDs in the default ignored list.
210 // A site that ever saved the Cache panel has its own copy of the list,
211 // which the new defaults never reach, so add them to it.
212 if ( version_compare( $current, '1.3.6', '<' ) ) {
213 self::add_new_ignored_params();
214 }
215
216 update_option( 'xspeed_data_version', self::DATA_VERSION, false );
217 }
218
219 /**
220 * Phase 2 of plugin init: fire the registration action (collecting
221 * Free + Pro + any third-party modules hooked into
222 * `xspeed_register_modules`) and boot the registry.
223 *
224 * Runs at plugins_loaded(20) so every add-on that hooks at any
225 * priority < 20 has time to register first.
226 */
227 public function fire_module_lifecycle(): void {
228 $this->ensure_modules_registered();
229
230 Module_Registry::boot_all();
231 }
232
233 /**
234 * Fire `xspeed_register_modules` if this request has not yet, hooking
235 * Free's own registration first when init() never got the chance.
236 *
237 * The activation request is the case that matters. activate_plugin()
238 * includes the plugin file long after `plugins_loaded` has fired, so the
239 * `plugins_loaded` callback init() would have added never runs, and
240 * neither does the add_action() inside it that puts register_free_modules
241 * on the action. Firing the action from activate() then registered
242 * nothing: Settings::conflict_safe_profile() composed from an empty
243 * registry, and a site with WP Super Cache came up with lazy-load,
244 * resource hints, font swapping and preloading switched on — only the
245 * four settings the registry-independent fallback names were held down
246 * (PR #295 review). Module_Registry::activate_all() has been a no-op on
247 * the same request for the same reason.
248 *
249 * On the activation request that means Free only: an add-on cannot have
250 * hooked yet, because xspeed-pro bails when Free's classes are absent and
251 * only hooks the action (at priority 20, from plugins_loaded(15)) once
252 * Free is active. On an ordinary request fire_module_lifecycle() reaches
253 * this at plugins_loaded(20) with every add-on already hooked. Do not
254 * call this from anything that can run in between: the action fires
255 * once, and an add-on that has not hooked yet stays unregistered for the
256 * whole request.
257 * did_action() keeps the action to one firing per request, so an
258 * activation that ran first does not make plugins_loaded(20) register
259 * every module a second time.
260 */
261 public function ensure_modules_registered(): void {
262 if ( did_action( 'xspeed_register_modules' ) ) {
263 return;
264 }
265
266 /*
267 * register_free_modules() does an unconditional `new` on every module
268 * class. On an ordinary request xspeed.php's integrity check refuses
269 * to boot before that can fatal and explains itself in an admin
270 * notice; the activation hook is registered outside that check, so
271 * an install missing a module file (truncated zip, a security
272 * plugin's quarantine, a half-applied update) would fatal here with
273 * no notice and no active plugin. Same answer as boot: do nothing.
274 */
275 if ( function_exists( 'xspeed_missing_core_classes' ) && ! empty( xspeed_missing_core_classes() ) ) {
276 return;
277 }
278
279 if ( ! has_action( 'xspeed_register_modules', array( $this, 'register_free_modules' ) ) ) {
280 add_action( 'xspeed_register_modules', array( $this, 'register_free_modules' ) );
281 }
282
283 /**
284 * Action: xspeed_register_modules
285 *
286 * Free modules register at priority 10; xspeed-pro at priority
287 * 20; site code can hook in between to inject custom modules.
288 * Fires exactly once per request.
289 */
290 do_action( 'xspeed_register_modules' );
291 }
292
293 /**
294 * Register the Free Modules shipped in this plugin. Add new module
295 * registrations here. Pro plugin hooks the same action separately.
296 */
297 public function register_free_modules(): void {
298 Module_Registry::register( new \XSpeed\Modules\Cache\CacheModule() );
299 Module_Registry::register( new \XSpeed\Modules\Health\HealthModule() );
300 // Settings — owns no settings itself; it's the CLI/MCP surface over
301 // Settings_Manager. Registering it is what makes `xspeed settings`
302 // exist, which is what keeps the curated get_settings/update_settings
303 // tools in the MCP catalog. (#149/#153)
304 Module_Registry::register( new \XSpeed\Modules\Settings\SettingsModule() );
305 // External performance scores (PSI / GTmetrix) — Free, off by
306 // default. Rendered inside the Health host page's PageSpeed tab, so
307 // it has no sidebar row of its own.
308 Module_Registry::register( new \XSpeed\Modules\Score\ScoreModule() );
309 Module_Registry::register( new \XSpeed\Modules\Preloader\PreloaderModule() );
310 Module_Registry::register( new \XSpeed\Modules\Heartbeat\HeartbeatModule() );
311 Module_Registry::register( new \XSpeed\Modules\Minify\MinifyModule() );
312 Module_Registry::register( new \XSpeed\Modules\Gzip\GzipModule() );
313 Module_Registry::register( new \XSpeed\Modules\Lazy\LazyModule() );
314 Module_Registry::register( new \XSpeed\Modules\Bloat\BloatModule() );
315 Module_Registry::register( new \XSpeed\Modules\Database\DatabaseModule() );
316 Module_Registry::register( new \XSpeed\Modules\Cdn\CdnModule() );
317 Module_Registry::register( new \XSpeed\Modules\Cloudflare\CloudflareModule() );
318 Module_Registry::register( new \XSpeed\Modules\ObjectCache\ObjectCacheModule() );
319 Module_Registry::register( new \XSpeed\Modules\BrowserCache\BrowserCacheModule() );
320 // Advanced Cache — a Free container row that gathers the Pro
321 // cache-coverage features (404 / search / feed / REST / rules /
322 // maintenance) into one sidebar sub-item (FBS-83633).
323 Module_Registry::register( new \XSpeed\Modules\CacheCoverage\CacheCoverageModule() );
324 Module_Registry::register( new \XSpeed\Modules\Fonts\FontsModule() );
325 Module_Registry::register( new \XSpeed\Modules\TurboRender\TurboRenderModule() );
326 Module_Registry::register( new \XSpeed\Modules\ResourceHints\ResourceHintsModule() );
327 // AI Privacy (GDPR off-switch) ships in Free even though every AI
328 // *feature* is Pro — privacy is a right, not a paid tier. FEATURES.md
329 // §AI row 6 mandates it. Without this registration the module was dead
330 // code: no REST/settings surface, the promised off-switch unreachable
331 // (FBS-83633 Bug 1). It carries its own cli_commands() so it satisfies
332 // the CLI/MCP coverage guard once registered.
333 Module_Registry::register( new \XSpeed\Modules\AIPrivacy\AIPrivacyModule() );
334 // Migration moved Pro → Free: it's an acquisition/onboarding feature
335 // (detect a competing caching plugin, import its settings, switch over),
336 // so it must work without a Pro license. Agency-scale extras (profiles,
337 // bulk multisite, host presets) remain Pro.
338 Module_Registry::register( new \XSpeed\Modules\Migration\MigrationModule() );
339 // Help & Support moved Pro → Free: a ticket link + read-only system
340 // snapshot is onboarding/diagnostics, not a paid value-add, so every
341 // user gets it. The snapshot degrades gracefully without Pro (Pro
342 // version/license fields fall back to defaults via defined()/get_option).
343 Module_Registry::register( new \XSpeed\Modules\Support\SupportModule() );
344 // The dashboard control for usage-analytics consent. Consent used to
345 // be collectable only in the wizard and withdrawable nowhere, while
346 // the wizard and readme both promised a dashboard switch. (#437)
347 Module_Registry::register( new \XSpeed\Modules\Privacy\PrivacyModule() );
348 // MCP remote control (AI assistants) — Free. The plugin serves the
349 // MCP protocol at the site's own /xspeed/mcp URL; the only gate is
350 // the per-site connection token an admin mints via Connect. No
351 // license, no hosted infra. See IMPLEMENTATION.md §17.
352 Module_Registry::register( new \XSpeed\Modules\Mcp\McpModule() );
353 }
354
355 /**
356 * Boot the opt-in usage tracker. Registers the cron sender only; the send
357 * itself is consent-gated inside Usage_Tracker. The instance is held so the
358 * onboarding REST handler can flip consent via usage_tracker()->opt_in().
359 */
360 public function start_plugin_tracking(): void {
361 $this->usage_tracker = Usage_Tracker::get_instance(
362 XSPEED_FILE,
363 array(
364 'opt_in' => true,
365 'email_marketing' => true,
366 'item_id' => defined( 'XSPEED_INSIGHTS_ITEM_ID' ) ? XSPEED_INSIGHTS_ITEM_ID : false,
367 )
368 );
369 $this->usage_tracker->init();
370 }
371
372 /**
373 * The shared Usage_Tracker singleton (or null if tracking wasn't booted,
374 * e.g. on the activation hook before init() runs).
375 */
376 public function usage_tracker(): ?Usage_Tracker {
377 return $this->usage_tracker;
378 }
379
380 public static function activate() {
381 // Nothing below can see a module the registry does not hold — the
382 // conflict-safe profile Settings::set_defaults() may pick is composed
383 // from it, and activate_all() walks it. See ensure_modules_registered()
384 // for why the registry is empty on this request without this call.
385 self::instance()->ensure_modules_registered();
386
387 $profile = Settings::set_defaults();
388
389 // Score history table. Also called on admin_init (see init()) because
390 // activation does not fire for a site added to a multisite network
391 // later, nor after an update that ships a new schema version.
392 Score_Store::maybe_install();
393
394 if ( ! file_exists( XSPEED_CACHE_DIR ) ) {
395 wp_mkdir_p( XSPEED_CACHE_DIR );
396 }
397 Cache::write_silence( XSPEED_CACHE_DIR );
398
399 /*
400 * One exception to "caching is only ever enabled from the admin UI":
401 * a fresh install another plugin performed on the user's behalf.
402 *
403 * That plugin asked the user for site performance and installed us to
404 * provide it; making them go and find a second switch afterwards is
405 * a step nobody wants. It is also what the copy-vendored Setup::finish()
406 * did, so hosts migrating off it keep the behaviour they have.
407 *
408 * PROFILE_HOST_PAGE_CACHE is the whole condition, and it means three
409 * things at once: the install was genuinely fresh, nothing else owns
410 * the page cache, and another plugin claimed the install. Every other
411 * fresh install — including a user's own on a clear site — waits for
412 * the wizard. Every OTHER feature is off in this profile; the cache is
413 * the one thing a host may assume, because it is what it installed us
414 * for. And toggle() runs its own ownership transaction, so a
415 * competitor appearing between the two checks loses the race rather
416 * than being overwritten.
417 */
418 if ( Settings::PROFILE_HOST_PAGE_CACHE === $profile ) {
419 $state = Cache::toggle( true );
420 if ( ! empty( $state['blocked'] ) ) {
421 /*
422 * Refused after all — a competitor that appeared between the
423 * profile decision and the write, or a drop-in we could not
424 * install. The settings are identical either way (everything
425 * off), so the honest record is the one that does not claim a
426 * cache: conflict-safe is what the site actually got.
427 */
428 $profile = Settings::PROFILE_CONFLICT_SAFE;
429 update_option( 'xspeed_install_profile', $profile, false );
430 }
431 }
432
433 /*
434 * Read the claim BEFORE spending it. consume_installed_by() records
435 * the installer only for a FRESH install — on a re-activation over
436 * settings that are already there it deletes the arming option and
437 * keeps nothing — so asking again afterwards answered "the user did
438 * it" about an install a host had just claimed, and the wizard opened
439 * over the host's own flow. The claim decides who to tell and whether
440 * to open the wizard; whether it is worth RECORDING is a separate
441 * question, and only the recording depends on the install being fresh.
442 */
443 $installed_by = Settings::installed_by();
444
445 // Spend the arming option now the profile is settled. It changes what
446 // activation does, so it may not survive into the next one.
447 Settings::consume_installed_by( $profile );
448
449 // Caching is otherwise only ENABLED from the admin UI — see
450 // Cache::toggle() and Rest_Api::toggle_cache(). A fresh install
451 // therefore gets no drop-in and no wp-config.php edit here:
452 // cache_enabled is unset, so the call below is a no-op.
453 //
454 // It is NOT a no-op during an upgrade. WordPress runs an update as
455 // deactivate → wipe files → install → activate, which deletes
456 // advanced-cache.php while cache_enabled stays true. Restoring it
457 // here closes the window in which the site silently serves uncached
458 // (auto_heal() alone only fires on the next wp-admin page load).
459 Cache::restore_dropin_if_enabled();
460
461 /*
462 * First-run wizard: flag a one-time redirect for the activating user.
463 * Suppressed for bulk activations / already-completed sites in
464 * Onboarding::maybe_redirect() — and here for an install another plugin
465 * performed, which has an onboarding flow of its own. The install runs
466 * over AJAX, so our redirect would fire on that admin's NEXT page load
467 * and pull them out of the middle of the host's wizard; finishing ours
468 * would then overwrite the deliberately all-off profile they never
469 * asked to change.
470 */
471 if ( '' === $installed_by ) {
472 Onboarding::flag_redirect();
473 }
474
475 // Propagate activation to every registered Module — registered by
476 // ensure_modules_registered() at the top, not by plugins_loaded,
477 // which fired before this file was even included.
478 Module_Registry::activate_all();
479
480 /**
481 * Fires at the end of activation, once the settings profile is decided.
482 *
483 * The other half of the host-plugin contract: a plugin that installed
484 * xSpeed for the user writes `xspeed_installed_by` before activating
485 * and listens here to find out how it came up. It carries no return
486 * value and nothing branches on it — a host that ignores it changes
487 * nothing about the install.
488 *
489 * @param string $installed_by Host slug, or '' when the user did it.
490 * @param string $profile Settings::PROFILE_* — which profile a fresh
491 * install came up with, '' if not fresh.
492 */
493 do_action( 'xspeed_activated', $installed_by, $profile );
494 }
495
496 /**
497 * Restore the cache drop-in right after THIS plugin is updated.
498 *
499 * Bound to upgrader_process_complete. Bulk updates, auto-updates and
500 * host-level updaters finish without re-running activate(), so this is
501 * the only hook that repairs the drop-in before the next wp-admin page
502 * load. Narrow by design: bails unless the completed action was a
503 * plugin update whose payload actually includes xspeed.
504 *
505 * @param \WP_Upgrader $upgrader Upgrader instance (unused).
506 * @param array $hook_extra Contextual data about the update.
507 * @return void
508 */
509 public function maybe_restore_after_update( $upgrader, $hook_extra ) {
510 unset( $upgrader );
511
512 if ( ! is_array( $hook_extra ) ) {
513 return;
514 }
515 if ( ! isset( $hook_extra['type'], $hook_extra['action'] ) ) {
516 return;
517 }
518 if ( 'plugin' !== $hook_extra['type'] || 'update' !== $hook_extra['action'] ) {
519 return;
520 }
521
522 // Single update uses 'plugin'; bulk uses 'plugins'.
523 $updated = array();
524 if ( isset( $hook_extra['plugins'] ) && is_array( $hook_extra['plugins'] ) ) {
525 $updated = $hook_extra['plugins'];
526 } elseif ( isset( $hook_extra['plugin'] ) && is_string( $hook_extra['plugin'] ) ) {
527 $updated = array( $hook_extra['plugin'] );
528 }
529
530 $ours = plugin_basename( XSPEED_FILE );
531 if ( ! in_array( $ours, $updated, true ) ) {
532 return;
533 }
534
535 Cache::restore_dropin_if_enabled();
536 }
537
538 public static function deactivate() {
539 // Drop-in + WP_CACHE constant are NOT touched here. WordPress
540 // upgrades run as deactivate → wipe files → install → activate,
541 // so removing those artifacts on every deactivate would silently
542 // disable caching after each plugin update. uninstall.php
543 // handles full teardown when the user actually removes the
544 // plugin; auto_heal() restores state on the next admin_init if
545 // the drop-in or WP_CACHE went missing for any other reason.
546 Cache::purge_all();
547 Minifier::purge_minified();
548 Gzip::apply( false );
549
550 Module_Registry::deactivate_all();
551 }
552 }
553