<?php

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/**

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* Purge handlers for X-LiteSpeed-Purge.

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*

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* @since 1.1.3

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* @since 2.2 Refactored. Changed access from public to private for most functions and class variables.

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* @package LiteSpeed

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*/

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namespace LiteSpeed;

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defined( 'WPINC' ) || exit();

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/**

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* Class Purge

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*/

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class Purge extends Base {

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const LOG_TAG = '🧹';

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/**

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* Public purge tags for X-LiteSpeed-Purge.

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*

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* @var array<int,string>

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*/

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protected $_pub_purge = [];

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/**

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* Public purge tags for X-LiteSpeed-Purge2.

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*

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* @var array<int,string>

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*/

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protected $_pub_purge2 = [];

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/**

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* Private purge tags for X-LiteSpeed-Purge (private section).

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*

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* @var array<int,string>

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*/

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protected $_priv_purge = [];

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/**

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* Whether to purge only current URL (QS helper).

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*

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* @var bool

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*/

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protected $_purge_single = false;

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const X_HEADER = 'X-LiteSpeed-Purge';

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const X_HEADER2 = 'X-LiteSpeed-Purge2';

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const DB_QUEUE = 'queue';

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const DB_QUEUE2 = 'queue2';

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const TYPE_PURGE_ALL = 'purge_all';

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const TYPE_PURGE_ALL_LSCACHE = 'purge_all_lscache';

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const TYPE_PURGE_ALL_CSSJS = 'purge_all_cssjs';

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const TYPE_PURGE_ALL_LOCALRES = 'purge_all_localres';

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const TYPE_PURGE_ALL_CCSS = 'purge_all_ccss';

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const TYPE_PURGE_ALL_UCSS = 'purge_all_ucss';

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const TYPE_PURGE_ALL_LQIP = 'purge_all_lqip';

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const TYPE_PURGE_ALL_VPI = 'purge_all_vpi';

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const TYPE_PURGE_ALL_AVATAR = 'purge_all_avatar';

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const TYPE_PURGE_ALL_OBJECT = 'purge_all_object';

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const TYPE_PURGE_ALL_OPCACHE = 'purge_all_opcache';

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const TYPE_PURGE_FRONT = 'purge_front';

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const TYPE_PURGE_UCSS = 'purge_ucss';

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const TYPE_PURGE_FRONTPAGE = 'purge_frontpage';

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const TYPE_PURGE_PAGES = 'purge_pages';

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const TYPE_PURGE_ERROR = 'purge_error';

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/**

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* Init hooks.

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*

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* @since 3.0

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* @return void

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*/

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public function init() {

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$purge_post_events = apply_filters(

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'litespeed_purge_post_events',

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[

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'delete_post',

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'wp_trash_post',

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'wp_update_comment_count',

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]

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);

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foreach ( $purge_post_events as $event ) {

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add_action( $event, [ $this, 'purge_post' ] );

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}

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// Purge post only when status is/was publish.

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add_action( 'transition_post_status', [ $this, 'purge_publish' ], 10, 3 );

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add_action( 'wp_update_comment_count', [ $this, 'purge_feeds' ] );

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if ( $this->conf( self::O_OPTM_UCSS ) ) {

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add_action( 'edit_post', __NAMESPACE__ . '\Purge::purge_ucss' );

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}

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}

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/**

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* Only purge publish related status post.

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*

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* @since 3.0

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* @param string $new_status New status.

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* @param string $old_status Old status.

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* @param \WP_Post $post Post object.

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* @return void

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*/

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public function purge_publish( $new_status, $old_status, $post ) {

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if ( 'publish' !== $new_status && 'publish' !== $old_status ) {

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return;

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}

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$this->purge_post( $post->ID );

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}

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/**

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* Handle all request actions from main cls.

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*

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* @since 1.8

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* @since 7.6 Add VPI clear.

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* @access public

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*/

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public function handler() {

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$type = Router::verify_type();

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switch ( $type ) {

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case self::TYPE_PURGE_ALL:

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$this->_purge_all();

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break;

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case self::TYPE_PURGE_ALL_LSCACHE:

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$this->_purge_all_lscache();

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break;

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case self::TYPE_PURGE_ALL_CSSJS:

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$this->_purge_all_cssjs();

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break;

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case self::TYPE_PURGE_ALL_LOCALRES:

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$this->_purge_all_localres();

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break;

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case self::TYPE_PURGE_ALL_CCSS:

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$this->_purge_all_ccss();

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break;

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case self::TYPE_PURGE_ALL_UCSS:

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$this->_purge_all_ucss();

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break;

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case self::TYPE_PURGE_ALL_LQIP:

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$this->_purge_all_lqip();

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break;

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case self::TYPE_PURGE_ALL_VPI:

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$this->_purge_all_vpi();

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break;

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case self::TYPE_PURGE_ALL_AVATAR:

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$this->_purge_all_avatar();

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break;

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case self::TYPE_PURGE_ALL_OBJECT:

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$this->_purge_all_object();

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break;

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case self::TYPE_PURGE_ALL_OPCACHE:

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$this->purge_all_opcache();

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break;

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case self::TYPE_PURGE_FRONT:

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$this->_purge_front();

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break;

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case self::TYPE_PURGE_UCSS:

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$this->_purge_ucss();

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break;

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case self::TYPE_PURGE_FRONTPAGE:

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$this->_purge_frontpage();

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break;

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case self::TYPE_PURGE_PAGES:

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$this->_purge_pages();

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break;

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case ( 0 === strpos( $type, self::TYPE_PURGE_ERROR ) ):

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$this->_purge_error( substr( $type, strlen( self::TYPE_PURGE_ERROR ) ) );

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break;

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default:

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break;

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}

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Admin::redirect();

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}

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/**

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* Shortcut to purge all lscache.

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*

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* @since 1.0.0

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* @param string|false $reason Optional reason to log.

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* @return void

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*/

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public static function purge_all( $reason = false ) {

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self::cls()->_purge_all( $reason );

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}

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/**

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* Purge all caches (LSCache/CSS/JS/localres/object/opcache).

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*

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* @since 2.2

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* @param string|false $reason Optional log string.

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* @return void

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*/

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private function _purge_all( $reason = false ) {

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$this->_purge_all_lscache( true );

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$this->_purge_all_cssjs( true );

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$this->_purge_all_localres( true );

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$this->_purge_all_object( true );

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$this->purge_all_opcache( true );

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if ( $this->conf( self::O_CDN_CLOUDFLARE_CLEAR ) ) {

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CDN\Cloudflare::purge_all( 'Purge All' );

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}

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$reason = is_string( $reason ) ? "( $reason )" : '';

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self::debug( 'Purge all ' . $reason, 3 );

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$msg = __( 'Purged all caches successfully.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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do_action( 'litespeed_purged_all' );

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}

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/**

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* Shortcut to purge lscache.

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*

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* @since 7.7

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* @param string|false $reason Optional reason to log.

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* @return void

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*/

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public static function purge_all_lscache( $reason = false ) {

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if ( $reason ) {

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self::debug( 'Purge lscache ' . $reason, 3 );

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}

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self::cls()->_purge_all_lscache();

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}

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/**

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* Alerts LiteSpeed Web Server to purge all pages.

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*

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* @since 2.2

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

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private function _purge_all_lscache( $silence = false ) {

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$this->_add( '*' );

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do_action( 'litespeed_purged_all_lscache' );

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if ( ! $silence ) {

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$msg = __( 'Notified LiteSpeed Web Server to purge all LSCache entries.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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}

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}

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/**

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* Delete all critical CSS.

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*

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* @since 2.3

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

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private function _purge_all_ccss( $silence = false ) {

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do_action( 'litespeed_purged_all_ccss' );

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$this->cls( 'CSS' )->rm_cache_folder( 'ccss' );

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$this->cls( 'Data' )->url_file_clean( 'ccss' );

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if ( ! $silence ) {

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$msg = __( 'Cleaned all Critical CSS files.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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}

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}

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/**

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* Delete all unique CSS.

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*

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* @since 2.3

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

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private function _purge_all_ucss( $silence = false ) {

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do_action( 'litespeed_purged_all_ucss' );

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$this->cls( 'CSS' )->rm_cache_folder( 'ucss' );

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$this->cls( 'Data' )->url_file_clean( 'ucss' );

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if ( ! $silence ) {

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$msg = __( 'Cleaned all Unique CSS files.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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}

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}

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/**

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* Purge one UCSS by URL or post ID.

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*

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* @since 4.5

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* @param int|string $post_id_or_url Post ID or URL.

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* @return void

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*/

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public static function purge_ucss( $post_id_or_url ) {

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self::debug( 'Purge a single UCSS: ' . $post_id_or_url );

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// If is post_id, generate URL.

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if ( ! preg_match( '/\D/', (string) $post_id_or_url ) ) {

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$post_id_or_url = get_permalink( (int) $post_id_or_url );

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}

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$post_id_or_url = (string) $post_id_or_url;

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$permalink_structure = get_option( 'permalink_structure' );

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if ( ! empty( $permalink_structure ) ) {

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$post_id_or_url = trailingslashit( (string) $post_id_or_url );

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}

[337] Fix | Delete

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$existing_url_files = Data::cls()->mark_as_expired( $post_id_or_url, true );

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if ( $existing_url_files ) {

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self::cls( 'UCSS' )->add_to_q( $existing_url_files );

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}

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}

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/**

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* Delete all LQIP images.

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*

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* @since 3.0

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

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private function _purge_all_lqip( $silence = false ) {

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do_action( 'litespeed_purged_all_lqip' );

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$this->cls( 'Placeholder' )->rm_cache_folder( 'lqip' );

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if ( ! $silence ) {

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$msg = __( 'Cleaned all LQIP files.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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}

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}

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[364] Fix | Delete

/**

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* Delete all VPI data generated

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*

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* @since 7.6

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* @param bool $silence If true, don't show admin notice.

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* @return void

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* @access private

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*/

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private function _purge_all_vpi( $silence = false ) {

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global $wpdb;

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do_action( 'litespeed_purged_all_vpi' );

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$wpdb->query( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery

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$wpdb->prepare(

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'DELETE FROM `' . $wpdb->postmeta . '` WHERE meta_key = %s',

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VPI::POST_META

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)

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);

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$wpdb->query( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery

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$wpdb->prepare(

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'DELETE FROM `' . $wpdb->postmeta . '` WHERE meta_key = %s',

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VPI::POST_META_MOBILE

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)

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);

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$this->cls( 'Placeholder' )->rm_cache_folder( 'vpi' );

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if ( !$silence ) {

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$msg = __( 'Cleaned all VPI data.', 'litespeed-cache' );

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!defined( 'LITESPEED_PURGE_SILENT' ) && Admin_Display::success( $msg );

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}

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}

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[396] Fix | Delete

/**

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* Delete all avatar images

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*

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* @since 3.0

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

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private function _purge_all_avatar( $silence = false ) {

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do_action( 'litespeed_purged_all_avatar' );

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// Clear Database table

[407] Fix | Delete

$this->cls( 'Data' )->table_truncate( 'avatar' );

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// Remove the folder

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$this->cls( 'Avatar' )->rm_cache_folder( 'avatar' );

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if ( ! $silence ) {

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$msg = __( 'Cleaned all Gravatar files.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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}

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}

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/**

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* Delete all localized resources.

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*

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* @since 3.3

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

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private function _purge_all_localres( $silence = false ) {

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do_action( 'litespeed_purged_all_localres' );

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$this->_add( Tag::TYPE_LOCALRES );

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if ( ! $silence ) {

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$msg = __( 'Cleaned all localized resource entries.', 'litespeed-cache' );

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if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

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Admin_Display::success( $msg );

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}

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}

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}

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[439] Fix | Delete

/**

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* Purge CSS/JS assets and related LSCache entries.

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*

[442] Fix | Delete

* @since 1.2.2

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* @param bool $silence If true, don't show admin notice.

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* @return void

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*/

[446] Fix | Delete

private function _purge_all_cssjs( $silence = false ) {

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if ( wp_doing_cron() || defined( 'LITESPEED_DID_send_headers' ) ) {

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self::debug( '❌ Bypassed cssjs delete as header sent (lscache purge after this point will fail) or doing cron' );

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return;

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}

[451] Fix | Delete

[452] Fix | Delete

$this->_purge_all_lscache( $silence ); // Purge CSSJS must purge lscache too to avoid 404

[453] Fix | Delete

[454] Fix | Delete

do_action( 'litespeed_purged_all_cssjs' );

[455] Fix | Delete

[456] Fix | Delete

Optimize::update_option( Optimize::ITEM_TIMESTAMP_PURGE_CSS, time() );

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[458] Fix | Delete

$this->_add( Tag::TYPE_MIN );

[459] Fix | Delete

[460] Fix | Delete

$this->cls( 'CSS' )->rm_cache_folder( 'css' );

[461] Fix | Delete

$this->cls( 'CSS' )->rm_cache_folder( 'js' );

[462] Fix | Delete

$this->cls( 'Data' )->url_file_clean( 'css' );

[463] Fix | Delete

$this->cls( 'Data' )->url_file_clean( 'js' );

[464] Fix | Delete

[465] Fix | Delete

// Clear UCSS queue as it used combined CSS to generate.

[466] Fix | Delete

$this->clear_q( 'ucss', true );

[467] Fix | Delete

[468] Fix | Delete

if ( ! $silence ) {

[469] Fix | Delete

$msg = __( 'Notified LiteSpeed Web Server to purge CSS/JS entries.', 'litespeed-cache' );

[470] Fix | Delete

if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

[471] Fix | Delete

Admin_Display::success( $msg );

[472] Fix | Delete

}

[473] Fix | Delete

}

[474] Fix | Delete

}

[475] Fix | Delete

[476] Fix | Delete

/**

[477] Fix | Delete

* Purge opcode cache.

[478] Fix | Delete

*

[479] Fix | Delete

* @since 1.8.2

[480] Fix | Delete

* @since 7.3 Added test for opcode cache restriction.

[481] Fix | Delete

* @param bool $silence If true, don't show admin notice.

[482] Fix | Delete

* @return bool True on success.

[483] Fix | Delete

*/

[484] Fix | Delete

public function purge_all_opcache( $silence = false ) {

[485] Fix | Delete

if ( ! Router::opcache_enabled() ) {

[486] Fix | Delete

self::debug( '❌ Failed to reset OPcache due to OPcache not enabled' );

[487] Fix | Delete

[488] Fix | Delete

if ( ! $silence ) {

[489] Fix | Delete

$msg = __( 'OPcache is not enabled.', 'litespeed-cache' );

[490] Fix | Delete

if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {

[491] Fix | Delete

Admin_Display::error( $msg );

[492] Fix | Delete

}

[493] Fix | Delete

}

[494] Fix | Delete

[495] Fix | Delete

return false;

[496] Fix | Delete

}

[497] Fix | Delete

[498] Fix | Delete

if ( Router::opcache_restricted( __FILE__ ) ) {

[499] Fix | Delete