=== Seraphinite Accelerator ===
Contributors: seraphinitesoft
Donate link: https://www.s-sols.com/products/wordpress/accelerator#offer
Tags: optimize,pagespeed,performance,speed up,cache
Requires PHP: 7.0
Requires at least: 4.5
Tested up to: 5.8
Stable tag: 2.2.2
License: GPLv2 or later (if another license is not provided)
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Privacy policy: https://www.s-sols.com/privacy-policy

Turns on site high speed to be attractive for people and search engines.

== Description ==

Turns on site high speed to be attractive for people and search engines. See more [how to use it](https://www.s-sols.com/docs/wordpress/accelerator/getting-started-accel).

**TO USE FREE ADDITIONAL FEATURES PLEASE INSTALL THE FREE EXTENDED PLUGIN VERSION BY FOLLOWING ONSCREEN PLUGIN'S INSTRUCTIONS.**

We kindly ask you to [post reviews](https://wordpress.org/support/plugin/seraphinite-accelerator/reviews?rate=5#new-post) to share experience about your site speed - it helps improving the plugin.

**Features**

*	**Fastest cache engine**
	A high-performance file [cache](https://www.s-sols.com/docs/wordpress/accelerator/settings-cache-accel) engine works as fast as possible on your site.
*	**High load tolerance**
	Cache [revalidation](https://www.s-sols.com/docs/wordpress/accelerator/status-and-operations-accel#operate) uses minimum resources.
*	**Security**
	User cached sessions are protected from brute force attacks.
*	**Optimization plugins compatibility**
	Many 3rd party optimization [plugins](https://www.s-sols.com/docs/wordpress/accelerator/getting-started-accel#compatibility) can be used.
*	**Various range of encoding**
	GZip, Deflate, Compress, Brotli, Uncompressed are [supported](https://www.s-sols.com/docs/wordpress/accelerator/settings-cache-accel#encodings).
*	**Cache data compression**
	[Decreases](https://www.s-sols.com/docs/wordpress/accelerator/settings-cache-accel#compression) storage data occupation.
*	**Browser cache**
	Leverage browser caching via .htaccess to reduce server load.
*	**Caching separation**
	Data is different for various [devices](https://www.s-sols.com/docs/wordpress/accelerator/settings-views-accel#devices) and [environment](https://www.s-sols.com/docs/wordpress/accelerator/settings-views-accel#parameters)s.
*	**No site registration and quoting**
	There is no any site registration and no time or page count quota.

**Free additional features**

*	**Multiple CDN**
	Rearrange balance on multiple [CDN](https://www.s-sols.com/docs/wordpress/accelerator/settings-cdn-accel)s to be faster and decrease costs.
*	**Lazy revalidation**
	Pages speed is always highest even while content [updating](https://www.s-sols.com/docs/wordpress/accelerator/settings-cache-accel#general).
*	**Cache storage space optimization**
	The same parts are stored uniquely, which significantly [saves space](https://www.s-sols.com/docs/wordpress/accelerator/settings-cache-accel#separation).
*	**Users cache**
	[Smart caching](https://www.s-sols.com/docs/wordpress/accelerator/settings-users-accel) of user' dependent pages like shop cart, online courses, etc.
*	**HTML error-correcting and checking**
	Managing unescaped scripts, misplaced and lost tags.
*	**Content size optimization**
	Minification of [Java-scripts](https://www.s-sols.com/docs/wordpress/accelerator/settings-scripts-accel#minify), [styles (CSS)](https://www.s-sols.com/docs/wordpress/accelerator/settings-styles-accel#general), [HTML](https://www.s-sols.com/docs/wordpress/accelerator/settings-html-accel#general).
*	**Media load optimization**
	Lazy loading of [images](https://www.s-sols.com/docs/wordpress/accelerator/settings-images-accel#lazy_load), [video](https://www.s-sols.com/docs/wordpress/accelerator/settings-frames-accel#lazy_load), [frames](https://www.s-sols.com/docs/wordpress/accelerator/settings-frames-accel#lazy_load), [fonts](https://www.s-sols.com/docs/wordpress/accelerator/settings-styles-accel#fonts).
*	**Scripts load optimization**
	[Java-scripts](https://www.s-sols.com/docs/wordpress/accelerator/settings-scripts-accel#general) and [styles (CSS)](https://www.s-sols.com/docs/wordpress/accelerator/settings-styles-accel#general) lazy loading, inlining, and deferring.

**Premium features**

*	**No page views limits**
	There is no limit of 5000 page views per month.
*	**No banner**
	There is no banner at the bottom of the site.
*	**No promotions**
	No promotions of other related plugins.
*	**Support**
	Personal prioritized [support](https://www.s-sols.com/support).

[More details](https://www.s-sols.com/products/wordpress/accelerator).

**Requirements**

*	[WordPress](https://wordpress.org/download) 4.5 or higher.
*	PHP 7.0 or higher.
*	Browser (Google Chrome, Firefox, IE).

**Compatibility**

*	[Google Tag Manager for WordPress](https://wordpress.org/plugins/duracelltomi-google-tag-manager) 1.11 or higher.
*	[Facebook for WordPress](https://wordpress.org/plugins/official-facebook-pixel) 3.0 or higher.
*	[Site Kit by Google - Analytics, Search Console, AdSense, Speed](https://wordpress.org/plugins/google-site-kit) 1.30 or higher.
*	[Realbig For WordPress](https://wordpress.org/plugins/realbig-media) 0.3 or higher.
*	[Yandex Metrica](https://wordpress.org/plugins/yandex-metrica) 1.8 or higher.
*	[JivoChat Live Chat](https://wordpress.org/plugins/jivochat) 1.3 or higher.
*	[EWWW Image Optimizer](https://wordpress.org/plugins/ewww-image-optimizer) 6.0 or higher.
*	[Smush - Lazy Load Images, Optimize & Compress Images](https://wordpress.org/plugins/wp-smushit) 3.8 or higher.
*	[reSmush.it : the only free Image Optimizer & compress plugin](https://wordpress.org/plugins/resmushit-image-optimizer) 0.4 or higher.
*	[Image optimization & Lazy Load by Optimole](https://wordpress.org/plugins/optimole-wp) 3.1 or higher.
*	[WooCommerce](https://wordpress.org/plugins/woocommerce) 3.5 or higher.
*	[WooCommerce Subscriptions](https://woocommerce.com/products/woocommerce-subscriptions) 2.4 or higher.
*	[LMS by LifterLMS](https://wordpress.org/plugins/lifterlms) 4.0 or higher.
*	[WordPress Social Login](https://wordpress.org/plugins/wordpress-social-login) 3.0 or higher.
*	[AMP for WP - Accelerated Mobile Pages](https://wordpress.org/plugins/accelerated-mobile-pages) 1.0 or higher, but pages' speed is not guaranteed due to this plugin already optimizes content.
*	[Autoptimize](https://wordpress.org/plugins/autoptimize) 2.8 or higher.
*	[LiteSpeed Cache](https://wordpress.org/plugins/litespeed-cache) 3.6 or higher.
*	[Jetpack - WP Security, Backup, Speed, & Growth](https://wordpress.org/plugins/jetpack) 9.7 or higher.
*	[All in One SEO Pack](https://wordpress.org/plugins/all-in-one-seo-pack) 4.0 or higher.
*	[Yoast SEO](https://wordpress.org/plugins/wordpress-seo) 16.0 or higher.
*	[Rank Math SEO](https://wordpress.org/plugins/seo-by-rank-math) 1.0 or higher.
*	[WPML](https://wpml.org) 4.0 or higher.
*	[PolyLang](https://polylang.pro) 1.8 or higher.
*	[Seraphinite Post .DOCX Source](https://wordpress.org/plugins/seraphinite-post-docx-source) 2.0 or higher.
*	[Seraphinite Bulk Discounts for WooCommerce](https://wordpress.org/plugins/seraphinite-discount-for-woocommerce) 2.0 or higher.
*	[Webinoly](https://webinoly.com) 1.14 or higher.
*	[ISPmanager](https://www.ispsystem.com/software/ispmanager) 6.0 or higher.
*	[Smart Slider 3](https://wordpress.org/plugins/smart-slider-3) 3.4 or higher.

== Installation ==

1. Choose the plugin from the WordPress repository, or choose the plugin's archive file in 'Upload Plugin' section in WordPress 'Plugins\Add New', or upload and extract the plugin archive to the '/wp-content/plugins' directory manually.
2. Activate the plugin through the 'Plugins' screen in WordPress.
3. It will appear in the admin UI as shown in the [screenshots](http://wordpress.org/plugins/seraphinite-accelerator/screenshots).

== Screenshots ==

1. Status and operations.
2. Settings.
3. Settings - Cache.
4. Settings - Browser cache.
5. Settings - Exclusions.
6. Settings - Different views cache.
7. Settings - Users.
8. Settings - HTML.
9. Settings - Images.
10. Settings - Videos and frames.
11. Settings - Scripts.
12. Settings - Styles.
13. Settings - CDN.
14. Settings - Advanced.

== Changelog ==

= 2.2.2 =

Fixes:

* Saving settings with XPath contains 'concat' is blocked by ModSecurity.
* Styles processing can cause PHP error 'Call to a member function removeChild()'.

= 2.2.1 =

Improvements:

* Correcting comments with long dash.
* Entering multiple URLs to update.
* Stop and restart if an update happened during optimization.

Fixes:

* Broken cache descriptor leads to optimize page while request.
* Lazy loading soft appearing style overlaps other block transitions.
* Optimization of a mobile version is not always recognized by the site.
* Optimization requests can be skipped by redirecting to themselves on some hosting.
* Queue item is skipped if the same URL already exists by external request.

= 2.2 =

Improvements:

* Multisite support.

Fixes:

* "Compress" encoding is not working correctly.
* AMP pages fail validation.
* Detecting images changes doesn't use WEBP files.
* Not the same site addresses are cached to main site address.
* Old Safari browser JS optimization compatibility.

= 2.1 =

Improvements:

* Attachment URLs and meta tags handling.

Fixes:

* Slashes in styles' strings are duplicated.

= 2.0.3 =

Improvements:

* Styles processing speed increase.

Fixes:

* CloudFlare limits requests for not more than 100 seconds.
* Script error if WPMeteor in enabled.
* Unclosed tag 'p' is removed instead of leaving with opening correction.

= 2.0.2 =

Improvements:

* Warning about conflict lazy loading settings with 'a3 Lazy Load' and 'Lazy Load - Optimize Images'.
* Warning about conflict settings with 'Jetpack'.
* When the page display limit is reached, switch to simple caching mode.

Fixes:

* CSS colors with variables are parsed incorrectly.
* HTML's UTF-8 symbols are encoded incorrectly under some hostings.
* Showing 0x8019030C error code instead of HTTP 524.

= 2.0.1 =

Improvements:

* Processing timeout has been increased to 10 minutes for heavy pages.

Fixes:

* Pageview statistics counts REST API calls.

= 2.0 =

Behavior changes:

* Now free version is full with limits to page visits and product's banner on each page.

Improvements:

* LazyLoad image exclusions now apply to iframe.
* The support button now opens the site page instead of the email client.

= 1.8.9 =

Improvements:

* Upgrading from free version to full.

= 1.8.8 =

Fixes:

* HTML's UTF-8 symbols are encoded incorrectly under some hostings.
* Styles that contain %7B%7Bid%7D%7D or similar are parsed incorrectly.
* URLs are ended and not ended with slash are interpreted as the same.
* Unable to upgrade Extended and Premium version.

= 1.8.7 =

Improvements:

* Import/export of settings.

= 1.8.6 =

Improvements:

* Excludes for automatic non-critical CSS.
* List of additional pages to update when a post is changed.

Fixes:

* 'source' from 'picture' tag is processed incorrectly.
* After restoring the settings, advanced-cache.php is not updated.

= 1.8.5 =

Fixes:

* Safari browser compatibility.
* Update terminates due to timeout on some hosting.

= 1.8.4 =

Improvements:

* Initializing tables on plugin's activation.
* Optimization queue management.
* The status of the end of page optimization.

Fixes:

* Scripts relying on document.readyState are loaded incorrectly.
* Undefined index in oper.php.

= 1.8.3 =

Improvements:

* Showing an error when using caching of other plugins.

Fixes:

* Bing's crawler gives a warning about large page size.
* Cached https version is given by http.
* Lazy load for iframe: non pixel size is used.
* Sometimes Ext, Full versions are updated to Base version.
* Updating to full version is not always working.

= 1.8.2 =

Fixes:

* Arguments not in lowercase were handled incorrectly.
* Letters' case in styles' variables are lost.
* Styles' color attribute sometimes is parsed incorrectly.
* Web server's 'pagespeed' module breaks styles loading.

= 1.8.1 =

Improvements:

* Asynchronous operations.

= 1.8 =

Behavior changes:

* Updating statistics in the status now is only in manual mode to avoid high server load.

Improvements:

* Asynchronous operations.
* Stopping the calculation of statistics.
* Warning about conflict settings with 'EWWW Image Optimizer'.
* Warning about conflict settings with 'Optimole'.
* Warning about conflict settings with 'Smush'.

Fixes:

* Redirect while page optimizing.
* Wrong query parsing with numbers as parameters.

= 1.7.7 =

Fixes:

* Lazy load: Placeholders for images hosted on external site have incorrect size.
* Styles grouping doesn't inline non critical part.

= 1.7.6 =

Fixes:

* Style grouping does not properly handle content when an 'import' directive is present.
* Styles 'turn' value is parsed incorrectly.

= 1.7.5 =

Fixes:

* Symbols '>' in attributes break HTML in additional fixing.

= 1.7.4 =

Improvements:

* Options: Multisite support.
* Woodmart theme: Warnings about conflicting settings.
* Woostroid2 theme: Warning about using page preloader.

Fixes:

* JetMenu is always shown expanded.

= 1.7.3 =

Improvements:

* Woodmart Theme: Favorites Support.

Fixes:

* Attributes with JSON values are broken while fixing HTML.
* CSS auto-separation places non-critical styles as first while grouping.
* Clicks are not processed until the scripts are loaded.
* HTML fixing changes 'p' tag covering.

= 1.7.2 =

Improvements:

* Clear cache notification.

Fixes:

* Mismatched version is always shown as new.

= 1.7.1 =

Improvements:

* Lazy Load: Images for preview videos.

Fixes:

* 'WP_CACHE' define is placed inside comments on some sites.
* LazyLoad: Video: YouTube: Preview is not always loaded.
* When caching mode is disabled by other plugins, optimization is always processing.

= 1.7 =

Improvements:

* Erasing the current queue when updating the cache.
* One admin menu item with sub-items.
* Upgrading from free version to full.

Fixes:

* CSS 'vmax' value incorrect parsing.
* Google Analytics script wrong detection.
* The tag 'xml' is displayed as text.

= 1.6.8 =

Fixes:

* Attribute 'data-bg' conflicts with other techniques.
* CSS auto-separation places non-critical styles as first while grouping.

= 1.6.7 =

Improvements:

* Compatibility with Optimole.

Fixes:

* CSS selectors minify: space before ':' is removed.
* On some sites, the error "WordPress database error: duplicate entries" appears.

= 1.6.6 =

Fixes:

* Refresh cache: PHP Fatal error in free version: Call to undefined function GetExtContents().

= 1.6.5 =

Fixes:

* CSS import directive is not on top of style while grouping.
* JS delayed load with integrity is failed.
* Tag 'address' looses children.

= 1.6.4 =

Improvements:

* Reducing the consumed memory when updating from the sitemap.

Fixes:

* LazyLoad: getComputedStyle error.
* Periodic cleaning might not work on some sites with blocked 'post' internal queries.
* With disabled grouping and auto-splitting CSS fonts are not loaded.

= 1.6.3 =

Fixes:

* Undefined variable %24run in admin on some sites.

= 1.6.2 =

Fixes:

* Processing queue might not work on some sites with blocked 'post' internal queries.

= 1.6.1 =

Fixes:

* CSS: incorrect parsing of font name containing forward slash.
* Incorrect CSS parsing of 'rgb' attribute without commas.
* Inlined styles are always processed last.
* URLs started with '\\' aren't prepended with 'http'.

= 1.6 =

Improvements:

* Auto-cleanup.
* Automatic page preprocessing (warming up).
* Clearing empty directories.
* Display efficiency in status.
* Minimum WordPress version is 4.5.
* Pages processing queue.

Fixes:

* Inlined background images get lazy loaded.
* Postpone processing might not work.
* Status: size is shown without decimal.
* When the page is in the cache then cron is not executed.

= 1.5.1 =

Improvements:

* Font separation in lazy loading styles.
* Premium update.
* TrinityMedia compatibility.

Fixes:

* 404 caching.
* Admin scripts.
* Ajax login redirects to cached page.
* URL revalidating with anchor doesn't work.

= 1.5 =

Improvements:

* Delayed loading of non-critical styles.
* Input-output security improvements.

= 1.4.5 =

Fixes:

* HTML parsing compatibility.

= 1.4.4 =

Improvements:

* CSS processing unification.
* Content parsing under multi-byte strings overloading.
* Parsing CSS uses a lot of memory.

Fixes:

* CSS 'calc' function might be parsed incorrectly.

= 1.4.3 =

Improvements:

* CSS background images processing.

Fixes:

* Smart Slider 3 compatibility.

= 1.4.2 =

Improvements:

* Exclude debug pages from indexing.

Fixes:

* Deferred CSS isn't loaded under noscript.
* Non-critical styles are not loaded under Firefox.

= 1.4.1 =

Improvements:

* Exclude debug pages from indexing.
* Russian localization correction.

= 1.4 =

Improvements:

* Don't optimize content for user cache.
* Fonts' option: Include to critical styles.
* Trace improvements.

Fixes:

* Caching wrong user context.
* Content async optimization doesn't work on sites under HTTP with CloudFlare under HTTPS.
* Content forced debug options don't apply to WordPress's lazy loading.
* Frames lazy load: about:blank treated as relative address.
* Incorrect minification of i18n.js.
* Internet Explorer 10 and lower: page is not interactive.

= 1.3.4 =

Fixes:

* Content async optimization doesn't work on sites under HTTP with CloudFlare under HTTPS.
* Image's lazyload placeholder has wrong size if srcset is set.

= 1.3.3 =

Fixes:

* Page enumeration links are wrong.

= 1.3.2 =

Improvements:

* Background page optimization.

Fixes:

* Apache on Windows: revalidating is too long.

= 1.3.1 =

Fixes:

* CSS IE suffixes are not parsed correctly after "important" suffixes.
* Comment's contents are appended by space at the end.
* Elementor's script is detected as special.

= 1.3 =

New features:

* CSS smart splitting.

Improvements:

* CSS grouping is turned on by default.
* Scripts grouping.
* Scripts' delayed loading speed increasing.

Fixes:

* LazyLoad: WooCommerce product image might be not processed.
* Yandex Webvisor: optimized styles are not loaded.

= 1.2.1 =

Improvements:

* Cache separation optimization.

Fixes:

* In Yandex-metrics's control panel the counter is displayed incorrectly set.
* Optimized styles are not loaded on Internet Explorer 11 and below.

= 1.2 =

Improvements:

* CSS inlining as body.

Fixes:

* Links are always encoded.

= 1.1 =

Improvements:

* Default timeout for scripts is 4.5 seconds.
* Warning about resetting the cache after changing the settings.

Fixes:

* Incorrect escaping of the internal special script.

= 1.0.1 =

Improvements:

* Backup previous settings structure.

Fixes:

* 'script' tags with 'type' of 'javascript' are escaped.
* License block is invisible just after installation if remote configuration is unavailable.
* WooCommerce notices might be cached to common pages.

= 1.0 =

New features:

* Browser cache.
* CDN support.
* Cache lazy refresh.
* Cache revalidation.
* File cache engine.
* Fonts optimization.
* HTML markup checker.
* Images lazy loading.
* Per user cache support.
* Polylang plugin support.

Improvements:

* Auto-detect already used lazy loading technique.
* Behavior changes notification warning.
* Checkboxes inner select links are now in Combo style.
* Clearing obsolete cache data.
* Customizing your own content separators.
* Disabling WordPress emoji icons.
* Download Preview and Full bundles by current version.
* LMS by LifterLMS support.
* Lazy load: images appearing animation.
* List items operations animation.
* Making backups when change .htaccess.
* Not meeting minimum requirements notifications.
* Optimization of loading external scripts.
* Precompress JS, CSS, WebP.
* Reset settings.
* Revalidating page's cache after post change.
* Security: sanitizing input parameters.
* Storing settings in JSON format to ensure import/export of data.

Fixes:

* "Key" link after "Order" button is invalid.
* 'Key' buttons might have background on some themes.
* AMP: post images aren't shown.
* Block's help button is shifted to right.
* CSS optimization: If script content is not changed then inlining is ignored.
* Cache is not reset if admin changes user depended data.
* Call to undefined function: wpml_element_type_filter.
* Characters are stripped from image URLs.
* Compatibility issues with Polylang plugin.
* Dirty HTML incorrect parsing.
* Doesn't fix script without closing tag.
* Frontend plugin queries are not valid for some sites.
* In rare cases admin UI is blocked.
* In the admin panel, the warning 'Undefined index' is shown, if DEBUG mode is enabled.
* Inline comboboxes too short in WP 5.3 or higher.
* JS minification.
* Multiple appearing of Change Version warning.
* On some systems, script loading fails, resulting in a site loading error.
* Output on some sites might be broken.
* PHP 5.4 'empty' operator compatibility.
* PHP 8: Fatal error on plugin initialization (call_user_func).
* PHP Compatibility Checker by WPEngine detects issues with PHP 7.3.
* Save settings result message is blocked by security plugins.
* Scripts and so on are not counted in statistics.
* Separator line is invisible under WordPress 5.2 or higher.
* Settings layout is too wide on some themes.
* Settings: 'Save changes' button is always in English.
* Unable to upgrade Extended and Premium version.