FM / src

/home/techb158/on-time-movers.com/wp-content/plugins/litespeed-cache/src/

/home/techb158/on-time-movers.com/wp-content/plugins/litespeed-cache/src

Name	Size	Mode	Actions
cdn/	-	0755	rm
data_structure/	-	0755	rm
activation.cls.php	17723	0644	edit dl rm
admin-display.cls.php	49632	0644	edit dl rm
admin-settings.cls.php	11383	0644	edit dl rm
admin.cls.php	6276	0644	edit dl rm
api.cls.php	10612	0644	edit dl rm
avatar.cls.php	8860	0644	edit dl rm
base.cls.php	38560	0644	edit dl rm
cdn.cls.php	16300	0644	edit dl rm
cloud-auth-callback.trait.php	10683	0644	edit dl rm
cloud-auth-ip.trait.php	4433	0644	edit dl rm
cloud-auth.trait.php	9608	0644	edit dl rm
cloud-misc.trait.php	10572	0644	edit dl rm
cloud-node.trait.php	6090	0644	edit dl rm
cloud-request.trait.php	20157	0644	edit dl rm
cloud.cls.php	7500	0644	edit dl rm
conf.cls.php	20000	0644	edit dl rm
control.cls.php	24933	0644	edit dl rm
core.cls.php	21474	0644	edit dl rm
crawler-map.cls.php	19874	0644	edit dl rm
crawler.cls.php	45795	0644	edit dl rm
css.cls.php	18200	0644	edit dl rm
data.cls.php	22738	0644	edit dl rm
data.upgrade.func.php	5856	0644	edit dl rm
db-optm.cls.php	15717	0644	edit dl rm
debug2.cls.php	18842	0644	edit dl rm
doc.cls.php	5577	0644	edit dl rm
error.cls.php	7530	0644	edit dl rm
esi.cls.php	27834	0644	edit dl rm
file.cls.php	10823	0644	edit dl rm
guest.cls.php	2821	0644	edit dl rm
gui.cls.php	37451	0644	edit dl rm
health.cls.php	2899	0644	edit dl rm
htaccess.cls.php	30526	0644	edit dl rm
img-optm-manage.trait.php	31586	0644	edit dl rm
img-optm-pull.trait.php	22632	0644	edit dl rm
img-optm-send.trait.php	22422	0644	edit dl rm
img-optm.cls.php	5383	0644	edit dl rm
import.cls.php	4395	0644	edit dl rm
import.preset.cls.php	5633	0644	edit dl rm
lang.cls.php	17430	0644	edit dl rm
localization.cls.php	4123	0644	edit dl rm
media.cls.php	45142	0644	edit dl rm
metabox.cls.php	5419	0644	edit dl rm
object-cache-wp.cls.php	19268	0644	edit dl rm
object-cache.cls.php	21450	0644	edit dl rm
object.lib.php	14504	0644	edit dl rm
optimize.cls.php	39568	0644	edit dl rm
optimizer.cls.php	10754	0644	edit dl rm
placeholder.cls.php	18358	0644	edit dl rm
purge.cls.php	35235	0644	edit dl rm
report.cls.php	6266	0644	edit dl rm
rest.cls.php	9301	0644	edit dl rm
root.cls.php	14631	0644	edit dl rm
router.cls.php	21256	0644	edit dl rm
str.cls.php	3156	0644	edit dl rm
tag.cls.php	9481	0644	edit dl rm
task.cls.php	7219	0644	edit dl rm
tool.cls.php	4268	0644	edit dl rm
ucss.cls.php	16739	0644	edit dl rm
utility.cls.php	26638	0644	edit dl rm
vary.cls.php	21842	0644	edit dl rm
vpi.cls.php	9600	0644	edit dl rm

Edit: /home/techb158/on-time-movers.com/wp-content/plugins/litespeed-cache/src/purge.cls.php (35235B)

<?php
/**
 * Purge handlers for X-LiteSpeed-Purge.
 *
 * @since   1.1.3
 * @since   2.2  Refactored. Changed access from public to private for most functions and class variables.
 * @package LiteSpeed
 */

namespace LiteSpeed;

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

/**
 * Class Purge
 */
class Purge extends Base {

const LOG_TAG = '🧹';

/**
	 * Public purge tags for X-LiteSpeed-Purge.
	 *
	 * @var array<int,string>
	 */
	protected $_pub_purge = [];

/**
	 * Public purge tags for X-LiteSpeed-Purge2.
	 *
	 * @var array<int,string>
	 */
	protected $_pub_purge2 = [];

/**
	 * Private purge tags for X-LiteSpeed-Purge (private section).
	 *
	 * @var array<int,string>
	 */
	protected $_priv_purge = [];

/**
	 * Whether to purge only current URL (QS helper).
	 *
	 * @var bool
	 */
	protected $_purge_single = false;

const X_HEADER  = 'X-LiteSpeed-Purge';
	const X_HEADER2 = 'X-LiteSpeed-Purge2';
	const DB_QUEUE  = 'queue';
	const DB_QUEUE2 = 'queue2';

const TYPE_PURGE_ALL          = 'purge_all';
	const TYPE_PURGE_ALL_LSCACHE  = 'purge_all_lscache';
	const TYPE_PURGE_ALL_CSSJS    = 'purge_all_cssjs';
	const TYPE_PURGE_ALL_LOCALRES = 'purge_all_localres';
	const TYPE_PURGE_ALL_CCSS     = 'purge_all_ccss';
	const TYPE_PURGE_ALL_UCSS     = 'purge_all_ucss';
	const TYPE_PURGE_ALL_LQIP     = 'purge_all_lqip';
	const TYPE_PURGE_ALL_VPI      = 'purge_all_vpi';
	const TYPE_PURGE_ALL_AVATAR   = 'purge_all_avatar';
	const TYPE_PURGE_ALL_OBJECT   = 'purge_all_object';
	const TYPE_PURGE_ALL_OPCACHE  = 'purge_all_opcache';

const TYPE_PURGE_FRONT     = 'purge_front';
	const TYPE_PURGE_UCSS      = 'purge_ucss';
	const TYPE_PURGE_FRONTPAGE = 'purge_frontpage';
	const TYPE_PURGE_PAGES     = 'purge_pages';
	const TYPE_PURGE_ERROR     = 'purge_error';

/**
	 * Init hooks.
	 *
	 * @since 3.0
	 * @return void
	 */
	public function init() {
		$purge_post_events = apply_filters(
			'litespeed_purge_post_events',
			[
				'delete_post',
				'wp_trash_post',
				'wp_update_comment_count',
			]
		);

foreach ( $purge_post_events as $event ) {
			add_action( $event, [ $this, 'purge_post' ] );
		}

// Purge post only when status is/was publish.
		add_action( 'transition_post_status', [ $this, 'purge_publish' ], 10, 3 );

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

if ( $this->conf( self::O_OPTM_UCSS ) ) {
			add_action( 'edit_post', __NAMESPACE__ . '\Purge::purge_ucss' );
		}
	}

/**
	 * Only purge publish related status post.
	 *
	 * @since 3.0
	 * @param string   $new_status New status.
	 * @param string   $old_status Old status.
	 * @param \WP_Post $post      Post object.
	 * @return void
	 */
	public function purge_publish( $new_status, $old_status, $post ) {
		if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
			return;
		}

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

/**
	 * Handle all request actions from main cls.
	 *
	 * @since  1.8
	 * @since  7.6 Add VPI clear.
	 * @access public
	 */
	public function handler() {
		$type = Router::verify_type();

switch ( $type ) {
			case self::TYPE_PURGE_ALL:
				$this->_purge_all();
				break;

case self::TYPE_PURGE_ALL_LSCACHE:
				$this->_purge_all_lscache();
				break;

case self::TYPE_PURGE_ALL_CSSJS:
				$this->_purge_all_cssjs();
				break;

case self::TYPE_PURGE_ALL_LOCALRES:
				$this->_purge_all_localres();
				break;

case self::TYPE_PURGE_ALL_CCSS:
				$this->_purge_all_ccss();
				break;

case self::TYPE_PURGE_ALL_UCSS:
				$this->_purge_all_ucss();
				break;

case self::TYPE_PURGE_ALL_LQIP:
				$this->_purge_all_lqip();
				break;

case self::TYPE_PURGE_ALL_VPI:
				$this->_purge_all_vpi();
				break;

case self::TYPE_PURGE_ALL_AVATAR:
				$this->_purge_all_avatar();
				break;

case self::TYPE_PURGE_ALL_OBJECT:
				$this->_purge_all_object();
				break;

case self::TYPE_PURGE_ALL_OPCACHE:
				$this->purge_all_opcache();
				break;

case self::TYPE_PURGE_FRONT:
				$this->_purge_front();
				break;

case self::TYPE_PURGE_UCSS:
				$this->_purge_ucss();
				break;

case self::TYPE_PURGE_FRONTPAGE:
				$this->_purge_frontpage();
				break;

case self::TYPE_PURGE_PAGES:
				$this->_purge_pages();
				break;

case ( 0 === strpos( $type, self::TYPE_PURGE_ERROR ) ):
				$this->_purge_error( substr( $type, strlen( self::TYPE_PURGE_ERROR ) ) );
				break;

default:
				break;
		}

Admin::redirect();
	}

/**
	 * Shortcut to purge all lscache.
	 *
	 * @since 1.0.0
	 * @param string|false $reason Optional reason to log.
	 * @return void
	 */
	public static function purge_all( $reason = false ) {
		self::cls()->_purge_all( $reason );
	}

/**
	 * Purge all caches (LSCache/CSS/JS/localres/object/opcache).
	 *
	 * @since 2.2
	 * @param string|false $reason Optional log string.
	 * @return void
	 */
	private function _purge_all( $reason = false ) {
		$this->_purge_all_lscache( true );
		$this->_purge_all_cssjs( true );
		$this->_purge_all_localres( true );
		$this->_purge_all_object( true );
		$this->purge_all_opcache( true );

if ( $this->conf( self::O_CDN_CLOUDFLARE_CLEAR ) ) {
			CDN\Cloudflare::purge_all( 'Purge All' );
		}

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

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

$msg = __( 'Purged all caches successfully.', 'litespeed-cache' );
		if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( $msg );
		}

do_action( 'litespeed_purged_all' );
	}

/**
	 * Shortcut to purge lscache.
	 *
	 * @since 7.7
	 * @param string|false $reason Optional reason to log.
	 * @return void
	 */
	public static function purge_all_lscache( $reason = false ) {
		if ( $reason ) {
			self::debug( 'Purge lscache ' . $reason, 3 );
		}

self::cls()->_purge_all_lscache();
	}
	
	/**
	 * Alerts LiteSpeed Web Server to purge all pages.
	 *
	 * @since 2.2
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_lscache( $silence = false ) {
		$this->_add( '*' );

do_action( 'litespeed_purged_all_lscache' );

if ( ! $silence ) {
			$msg = __( 'Notified LiteSpeed Web Server to purge all LSCache entries.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Delete all critical CSS.
	 *
	 * @since 2.3
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_ccss( $silence = false ) {
		do_action( 'litespeed_purged_all_ccss' );

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

if ( ! $silence ) {
			$msg = __( 'Cleaned all Critical CSS files.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Delete all unique CSS.
	 *
	 * @since 2.3
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_ucss( $silence = false ) {
		do_action( 'litespeed_purged_all_ucss' );

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

if ( ! $silence ) {
			$msg = __( 'Cleaned all Unique CSS files.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Purge one UCSS by URL or post ID.
	 *
	 * @since 4.5
	 * @param int|string $post_id_or_url Post ID or URL.
	 * @return void
	 */
	public static function purge_ucss( $post_id_or_url ) {
		self::debug( 'Purge a single UCSS: ' . $post_id_or_url );

// If is post_id, generate URL.
		if ( ! preg_match( '/\D/', (string) $post_id_or_url ) ) {
			$post_id_or_url = get_permalink( (int) $post_id_or_url );
		}

$post_id_or_url      = (string) $post_id_or_url;
		$permalink_structure = get_option( 'permalink_structure' );
		if ( ! empty( $permalink_structure ) ) {
			$post_id_or_url = trailingslashit( (string) $post_id_or_url );
		}

$existing_url_files = Data::cls()->mark_as_expired( $post_id_or_url, true );
		if ( $existing_url_files ) {
			self::cls( 'UCSS' )->add_to_q( $existing_url_files );
		}
	}

/**
	 * Delete all LQIP images.
	 *
	 * @since 3.0
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_lqip( $silence = false ) {
		do_action( 'litespeed_purged_all_lqip' );

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

if ( ! $silence ) {
			$msg = __( 'Cleaned all LQIP files.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Delete all VPI data generated
	 *
	 * @since 7.6
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 * @access private
	 */
	private function _purge_all_vpi( $silence = false ) {
		global $wpdb;
		do_action( 'litespeed_purged_all_vpi' );

$wpdb->query( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
			$wpdb->prepare(
				'DELETE FROM `' . $wpdb->postmeta . '` WHERE meta_key = %s',
				VPI::POST_META
			)
		);
		$wpdb->query( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
			$wpdb->prepare(
				'DELETE FROM `' . $wpdb->postmeta . '` WHERE meta_key = %s',
				VPI::POST_META_MOBILE
			)
		);
		$this->cls( 'Placeholder' )->rm_cache_folder( 'vpi' );

if ( !$silence ) {
			$msg = __( 'Cleaned all VPI data.', 'litespeed-cache' );
			!defined( 'LITESPEED_PURGE_SILENT' ) && Admin_Display::success( $msg );
		}
	}

/**
	 * Delete all avatar images
	 *
	 * @since 3.0
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_avatar( $silence = false ) {
		do_action( 'litespeed_purged_all_avatar' );

// Clear Database table
		$this->cls( 'Data' )->table_truncate( 'avatar' );
		// Remove the folder
		$this->cls( 'Avatar' )->rm_cache_folder( 'avatar' );

if ( ! $silence ) {
			$msg = __( 'Cleaned all Gravatar files.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Delete all localized resources.
	 *
	 * @since 3.3
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_localres( $silence = false ) {
		do_action( 'litespeed_purged_all_localres' );

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

if ( ! $silence ) {
			$msg = __( 'Cleaned all localized resource entries.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Purge CSS/JS assets and related LSCache entries.
	 *
	 * @since 1.2.2
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	private function _purge_all_cssjs( $silence = false ) {
		if ( wp_doing_cron() || defined( 'LITESPEED_DID_send_headers' ) ) {
			self::debug( '❌ Bypassed cssjs delete as header sent (lscache purge after this point will fail) or doing cron' );
			return;
		}

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

do_action( 'litespeed_purged_all_cssjs' );

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

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

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

// Clear UCSS queue as it used combined CSS to generate.
		$this->clear_q( 'ucss', true );

if ( ! $silence ) {
			$msg = __( 'Notified LiteSpeed Web Server to purge CSS/JS entries.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}
	}

/**
	 * Purge opcode cache.
	 *
	 * @since 1.8.2
	 * @since 7.3   Added test for opcode cache restriction.
	 * @param bool $silence If true, don't show admin notice.
	 * @return bool True on success.
	 */
	public function purge_all_opcache( $silence = false ) {
		if ( ! Router::opcache_enabled() ) {
			self::debug( '❌ Failed to reset OPcache due to OPcache not enabled' );

if ( ! $silence ) {
				$msg = __( 'OPcache is not enabled.', 'litespeed-cache' );
				if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
					Admin_Display::error( $msg );
				}
			}

return false;
		}

if ( Router::opcache_restricted( __FILE__ ) ) {
			self::debug( '❌ Failed to reset OPcache due to OPcache is restricted. File requesting the clear is not allowed.' );

if ( ! $silence ) {
				$msg = sprintf( __( 'OPcache is restricted by %s setting.', 'litespeed-cache' ), '<code>restrict_api</code>' );
				if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
					Admin_Display::error( $msg );
				}
			}

return false;
		}

if ( ! opcache_reset() ) {
			self::debug( '❌ Reset OPcache not worked' );

if ( ! $silence ) {
				$msg = __( 'Reset the OPcache failed.', 'litespeed-cache' );
				if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
					Admin_Display::success( $msg );
				}
			}

return false;
		}

do_action( 'litespeed_purged_all_opcache' );

self::debug( 'Reset OPcache' );

if ( ! $silence ) {
			$msg = __( 'Reset the entire OPcache successfully.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}

return true;
	}

/**
	 * Purge object cache (public wrapper).
	 *
	 * @since 3.4
	 * @param bool $silence If true, don't show admin notice.
	 * @return void
	 */
	public static function purge_all_object( $silence = true ) {
		self::cls()->_purge_all_object( $silence );
	}

/**
	 * Purge object cache.
	 *
	 * @since 1.8
	 * @param bool $silence If true, don't show admin notice.
	 * @return bool True on success.
	 */
	private function _purge_all_object( $silence = false ) {
		if ( ! defined( 'LSCWP_OBJECT_CACHE' ) ) {
			self::debug( 'Failed to flush object cache due to object cache not enabled' );

if ( ! $silence ) {
				$msg = __( 'Object cache is not enabled.', 'litespeed-cache' );
				Admin_Display::error( $msg );
			}

return false;
		}

do_action( 'litespeed_purged_all_object' );

$this->cls( 'Object_Cache' )->flush();
		self::debug( 'Flushed object cache' );

if ( ! $silence ) {
			$msg = __( 'Purge all object caches successfully.', 'litespeed-cache' );
			if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
				Admin_Display::success( $msg );
			}
		}

return true;
	}

/**
	 * Add public purge tags for current request.
	 *
	 * @since 1.1.3
	 * @param string|array<int,string> $tags   Tags to add.
	 * @param bool                     $purge2 Whether to send via X-LiteSpeed-Purge2.
	 * @return void
	 */
	public static function add( $tags, $purge2 = false ) {
		self::cls()->_add( $tags, $purge2 );
	}

/**
	 * Add tags to purge list.
	 *
	 * @since 2.2
	 * @param string|array<int,string> $tags   Tags.
	 * @param bool                     $purge2 Use Purge2 header.
	 * @return void
	 */
	private function _add( $tags, $purge2 = false ) {
		if ( ! is_array( $tags ) ) {
			$tags = [ $tags ];
		}

$tags = $this->_prepend_bid( $tags );

if ( ! array_diff( $tags, $purge2 ? $this->_pub_purge2 : $this->_pub_purge ) ) {
			return;
		}

if ( $purge2 ) {
			$this->_pub_purge2 = array_unique( array_merge( $this->_pub_purge2, $tags ) );
		} else {
			$this->_pub_purge = array_unique( array_merge( $this->_pub_purge, $tags ) );
		}

self::debug( 'added ' . implode( ',', $tags ) . ( $purge2 ? ' [Purge2]' : '' ), 8 );

// Send purge header immediately or queue if headers already sent or delayed.
		$curr_built = $this->_build( $purge2 );

if ( defined( 'LITESPEED_CLI' ) ) {
			// Can't send, already has output, need to save and wait for next run
			self::update_option($purge2 ? self::DB_QUEUE2 : self::DB_QUEUE, $curr_built);
			self::debug( 'CLI request, queue stored: ' . $curr_built );
		} else {
			if ( ! headers_sent() ) {
				header( $curr_built );
			}
			if ( wp_doing_cron() || defined( 'LITESPEED_DID_send_headers' ) || apply_filters( 'litespeed_delay_purge', false ) ) {
				self::update_option( $purge2 ? self::DB_QUEUE2 : self::DB_QUEUE, $curr_built );
				self::debug( 'Output existed, queue stored: ' . $curr_built );
			}
			self::debug( $curr_built );
		}
	}

/**
	 * Add private purge tags for current request.
	 *
	 * @since 1.1.3
	 * @param string|array<int,string> $tags Tags.
	 * @return void
	 */
	public static function add_private( $tags ) {
		self::cls()->_add_private( $tags );
	}

/**
	 * Add private ESI tag to purge list.
	 *
	 * @since 3.0
	 * @param string $tag ESI tag.
	 * @return void
	 */
	public static function add_private_esi( $tag ) {
		self::add_private( Tag::TYPE_ESI . $tag );
	}

/**
	 * Add private all tag to purge list.
	 *
	 * @since 3.0
	 * @return void
	 */
	public static function add_private_all() {
		self::add_private( '*' );
	}

/**
	 * Add private purge tags.
	 *
	 * @since 2.2
	 * @param string|array<int,string> $tags Tags.
	 * @return void
	 */
	private function _add_private( $tags ) {
		if ( ! is_array( $tags ) ) {
			$tags = [ $tags ];
		}

$tags = $this->_prepend_bid( $tags );

if ( ! array_diff( $tags, $this->_priv_purge ) ) {
			return;
		}

self::debug( 'added [private] ' . implode( ',', $tags ), 3 );

$this->_priv_purge = array_unique( array_merge( $this->_priv_purge, $tags ) );

// Send header immediately or skip if sent.
		$built = $this->_build();
		if ( $built && ! headers_sent() ) {
			header( $built );
		}
	}

/**
	 * Add current blog ID prefix to tags (multisite).
	 *
	 * @since 4.0
	 * @param array<int,string> $tags Tags.
	 * @return array<int,string>
	 */
	private function _prepend_bid( $tags ) {
		if ( in_array( '*', $tags, true ) ) {
			return [ '*' ];
		}

$curr_bid = is_multisite() ? get_current_blog_id() : '';

foreach ( $tags as $k => $v ) {
			$tags[ $k ] = $curr_bid . '_' . $v;
		}
		return $tags;
	}

/**
	 * Activate `purge single url tag` for Admin QS.
	 *
	 * @since 1.1.3
	 * @return void
	 */
	public static function set_purge_single() {
		self::cls()->_purge_single = true;
		do_action( 'litespeed_purged_single' );
	}

/**
	 * Purge frontend url (based on HTTP_REFERER).
	 *
	 * @since 1.3
	 * @since 2.2 Access changed from public to private, renamed from `frontend_purge`.
	 * @return void
	 */
	private function _purge_front() {
		if ( empty( $_SERVER['HTTP_REFERER'] ) ) {
			exit( 'no referer' );
		}

$ref = esc_url_raw( wp_unslash( $_SERVER['HTTP_REFERER'] ) );

$this->purge_url( $ref );

do_action( 'litespeed_purged_front', $ref );

wp_safe_redirect( $ref );
		exit;
	}

/**
	 * Purge single UCSS (via referer or `url_tag`).
	 *
	 * @since 4.7
	 * @return void
	 */
	private function _purge_ucss() {
		if ( empty( $_SERVER['HTTP_REFERER'] ) ) {
			exit( 'no referer' );
		}

$ref = esc_url_raw( wp_unslash( $_SERVER['HTTP_REFERER'] ) );

$url_tag = ! empty( $_GET['url_tag'] ) ? sanitize_text_field( wp_unslash( $_GET['url_tag'] ) ) : $ref; // phpcs:ignore WordPress.Security.NonceVerification.Recommended

self::debug( 'Purge ucss [url_tag] ' . $url_tag );

do_action( 'litespeed_purge_ucss', $url_tag );
		$this->purge_url( $ref );

wp_safe_redirect( $ref );
		exit;
	}

/**
	 * Purge the front page.
	 *
	 * @since 1.0.3
	 * @return void
	 */
	private function _purge_frontpage() {
		$this->_add( Tag::TYPE_FRONTPAGE );
		if ( 'LITESPEED_SERVER_OLS' !== LITESPEED_SERVER_TYPE ) {
			$this->_add_private( Tag::TYPE_FRONTPAGE );
		}

$msg = __( 'Notified LiteSpeed Web Server to purge the front page.', 'litespeed-cache' );
		if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( $msg );
		}
		do_action( 'litespeed_purged_frontpage' );
	}

/**
	 * Purge all pages.
	 *
	 * @since 1.0.15
	 * @return void
	 */
	private function _purge_pages() {
		$this->_add( Tag::TYPE_PAGES );

$msg = __( 'Notified LiteSpeed Web Server to purge all pages.', 'litespeed-cache' );
		if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( $msg );
		}
		do_action( 'litespeed_purged_pages' );
	}

/**
	 * Purge error pages (403/404/500).
	 *
	 * @since 1.0.14
	 * @param string|false $type Error type.
	 * @return void
	 */
	private function _purge_error( $type = false ) {
		$this->_add( Tag::TYPE_HTTP );

if ( ! $type || ! in_array( (string) $type, [ '403', '404', '500' ], true ) ) {
			return;
		}

$this->_add( Tag::TYPE_HTTP . $type );

$msg = __( 'Notified LiteSpeed Web Server to purge error pages.', 'litespeed-cache' );
		if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( $msg );
		}
	}

/**
	 * Purge selected category by slug.
	 *
	 * @since 1.0.7
	 * @param string $value Category slug.
	 * @return void
	 */
	public function purge_cat( $value ) {
		$val = trim( (string) $value );
		if ( '' === $val ) {
			return;
		}
		if ( 0 === preg_match( '/^[a-zA-Z0-9-]+$/', $val ) ) {
			self::debug( "$val cat invalid" );
			return;
		}
		$cat = get_category_by_slug( $val );
		if ( false === $cat ) {
			self::debug( "$val cat not existed/published" );
			return;
		}

self::add( Tag::TYPE_ARCHIVE_TERM . $cat->term_id );

if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( sprintf( __( 'Purge category %s', 'litespeed-cache' ), $val ) );
		}

do_action( 'litespeed_purged_cat', $value );
	}

/**
	 * Purge selected tag by slug.
	 *
	 * @since 1.0.7
	 * @param string $val Tag slug.
	 * @return void
	 */
	public function purge_tag( $val ) {
		$val = trim( (string) $val );
		if ( '' === $val ) {
			return;
		}
		if ( 0 === preg_match( '/^[a-zA-Z0-9-]+$/', $val ) ) {
			self::debug( "$val tag invalid" );
			return;
		}
		$term = get_term_by( 'slug', $val, 'post_tag' );
		if ( false === $term ) {
			self::debug( "$val tag not exist" );
			return;
		}

self::add( Tag::TYPE_ARCHIVE_TERM . $term->term_id );

if ( ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( sprintf( __( 'Purge tag %s', 'litespeed-cache' ), $val ) );
		}

do_action( 'litespeed_purged_tag', $val );
	}

/**
	 * Purge selected url (relative allowed).
	 *
	 * @since 1.0.7
	 * @param string $url    URL.
	 * @param bool   $purge2 Use Purge2 header.
	 * @param bool   $quite  If true, do not show admin notice.
	 * @return void
	 */
	public function purge_url( $url, $purge2 = false, $quite = false ) {
		$val = trim( (string) $url );
		if ( '' === $val ) {
			return;
		}

if ( false !== strpos( $val, '<' ) ) {
			self::debug( "$val url contains <" );
			return;
		}

$val  = Utility::make_relative( $val );
		$hash = Tag::get_uri_tag( $val );

if ( false === $hash ) {
			self::debug( "$val url invalid" );
			return;
		}

self::add( $hash, $purge2 );

if ( ! $quite && ! defined( 'LITESPEED_PURGE_SILENT' ) ) {
			Admin_Display::success( sprintf( __( 'Purge url %s', 'litespeed-cache' ), $val ) );
		}

do_action( 'litespeed_purged_link', $url );
	}

/**
	 * Purge a list based on admin selection.
	 *
	 * @since 1.0.7
	 * @return void
	 */
	public function purge_list() {
		if ( ! isset( $_REQUEST[ Admin_Display::PURGEBYOPT_SELECT ], $_REQUEST[ Admin_Display::PURGEBYOPT_LIST ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return;
		}

$sel      = sanitize_text_field( wp_unslash( $_REQUEST[ Admin_Display::PURGEBYOPT_SELECT ] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$list_buf = sanitize_textarea_field( wp_unslash( $_REQUEST[ Admin_Display::PURGEBYOPT_LIST ] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended

if ( '' === $list_buf ) {
			return;
		}

$list_buf = str_replace( ',', "\n", $list_buf );
		$raw_list = explode( "\n", $list_buf );

switch ( $sel ) {
			case Admin_Display::PURGEBY_CAT:
            $cb = 'purge_cat';
				break;
			case Admin_Display::PURGEBY_PID:
            $cb = 'purge_post';
				break;
			case Admin_Display::PURGEBY_TAG:
            $cb = 'purge_tag';
				break;
			case Admin_Display::PURGEBY_URL:
            $cb = 'purge_url';
				break;
			default:
				return;
		}

array_map( [ $this, $cb ], $raw_list );

// For redirection (safe copy back to GET).
		$_GET[ Admin_Display::PURGEBYOPT_SELECT ] = $sel; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
	}

/**
	 * Purge ESI.
	 *
	 * @since 3.0
	 * @param string $tag ESI tag.
	 * @return void
	 */
	public static function purge_esi( $tag ) {
		self::add( Tag::TYPE_ESI . $tag );
		do_action( 'litespeed_purged_esi', $tag );
	}

/**
	 * Purge a certain post type.
	 *
	 * @since 3.0
	 * @param string $post_type Post type.
	 * @return void
	 */
	public static function purge_posttype( $post_type ) {
		self::add( Tag::TYPE_ARCHIVE_POSTTYPE . $post_type );
		self::add( $post_type );

do_action( 'litespeed_purged_posttype', $post_type );
	}

/**
	 * Purge all related tags to a post.
	 *
	 * @since 1.0.0
	 * @param int $pid Post ID.
	 * @return void
	 */
	public function purge_post( $pid ) {
		$pid = (int) $pid;

// Ignore the status we don't care.
		$status = get_post_status( $pid );
		if ( ! $pid || ! in_array( $status, [ 'publish', 'trash', 'private', 'draft' ], true ) ) {
			return;
		}

$purge_tags = $this->_get_purge_tags_by_post( $pid );
		if ( ! $purge_tags ) {
			return;
		}

self::add( $purge_tags );
		if ( $this->conf( self::O_CACHE_REST ) ) {
			self::add( Tag::TYPE_REST );
		}

do_action( 'litespeed_purged_post', $pid );
	}

/**
	 * Purge a widget by ID (or discover Recent Comments widget).
	 *
	 * Hooked to load-widgets.php.
	 *
	 * @since 1.1.3
	 * @param string|null $widget_id Widget ID.
	 * @return void
	 */
	public static function purge_widget( $widget_id = null ) {
		if ( null === $widget_id ) {
			if ( empty( $_POST['widget-id'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
				return;
			}
			$widget_id = sanitize_text_field( wp_unslash( $_POST['widget-id'] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Missing
			if ( '' === $widget_id ) {
				return;
			}
		}

self::add( Tag::TYPE_WIDGET . $widget_id );
		self::add_private( Tag::TYPE_WIDGET . $widget_id );

do_action( 'litespeed_purged_widget', $widget_id );
	}

/**
	 * Purges the comment widget when the count is updated.
	 *
	 * @since 1.1.3
	 * @global \WP_Widget_Factory $wp_widget_factory
	 * @return void
	 */
	public static function purge_comment_widget() {
		global $wp_widget_factory;
		if ( ! isset( $wp_widget_factory->widgets['WP_Widget_Recent_Comments'] ) ) {
			return;
		}

$recent_comments = $wp_widget_factory->widgets['WP_Widget_Recent_Comments'];
		if ( null !== $recent_comments ) {
			self::add( Tag::TYPE_WIDGET . $recent_comments->id );
			self::add_private( Tag::TYPE_WIDGET . $recent_comments->id );

do_action( 'litespeed_purged_comment_widget', $recent_comments->id );
		}
	}

/**
	 * Purges feeds on comment count update.
	 *
	 * @since 1.0.9
	 * @return void
	 */
	public function purge_feeds() {
		if ( $this->conf( self::O_CACHE_TTL_FEED ) > 0 ) {
			self::add( Tag::TYPE_FEED );
		}
		do_action( 'litespeed_purged_feeds' );
	}

/**
	 * Purges all private cache entries when the user logs out.
	 *
	 * @since 1.1.3
	 * @return void
	 */
	public static function purge_on_logout() {
		self::add_private_all();
		do_action( 'litespeed_purged_on_logout' );
	}

/**
	 * Finalize purge tags before output.
	 *
	 * @since 1.1.3
	 * @return void
	 */
	private function _finalize() {
		if ( ! defined( 'LITESPEED_DID_' . __FUNCTION__ ) ) {
			define( 'LITESPEED_DID_' . __FUNCTION__, true );
		} else {
			return;
		}

do_action( 'litespeed_purge_finalize' );

// Append unique uri purge tags if Admin QS is `PURGESINGLE` or `PURGE`.
		if ( $this->_purge_single ) {
			$tags             = [ Tag::build_uri_tag() ];
			$this->_pub_purge = array_merge( $this->_pub_purge, $this->_prepend_bid( $tags ) );
		}

if ( ! empty( $this->_pub_purge ) ) {
			$this->_pub_purge = array_unique( $this->_pub_purge );
		}

if ( ! empty( $this->_priv_purge ) ) {
			$this->_priv_purge = array_unique( $this->_priv_purge );
		}
	}

/**
	 * Gather and return purge header string.
	 *
	 * @since 1.1.0
	 * @return string Purge header line.
	 */
	public static function output() {
		$instance = self::cls();

$instance->_finalize();

return $instance->_build();
	}

/**
	 * Build the current purge header(s).
	 *
	 * @since 1.1.5
	 * @param bool $purge2 Whether to build X-LiteSpeed-Purge2.
	 * @return string Purge header line.
	 */
	private function _build( $purge2 = false ) {
		if ( $purge2 ) {
			if ( empty( $this->_pub_purge2 ) ) {
				return '';
			}
		} elseif ( empty( $this->_pub_purge ) && empty( $this->_priv_purge ) ) {
			return '';
		}

$purge_header   = '';
		$private_prefix = self::X_HEADER . ': private,';

// Handle purge2.
		if ( $purge2 ) {
			$public_tags = $this->_append_prefix( $this->_pub_purge2 );
			if ( empty( $public_tags ) ) {
				return '';
			}
			$purge_header = self::X_HEADER2 . ': public,';
			if ( Control::is_stale() ) {
				$purge_header .= 'stale,';
			}
			$purge_header .= implode( ',', $public_tags );
			return $purge_header;
		}

if ( ! empty( $this->_pub_purge ) ) {
			$public_tags = $this->_append_prefix( $this->_pub_purge );
			if ( empty( $public_tags ) ) {
				return ''; // If this ends up empty, private will also end up empty
			}
			$purge_header = self::X_HEADER . ': public,';
			if ( Control::is_stale() ) {
				$purge_header .= 'stale,';
			}
			$purge_header  .= implode( ',', $public_tags );
			$private_prefix = ';private,';
		}

// Private purge tags.
		if ( ! empty( $this->_priv_purge ) ) {
			$private_tags  = $this->_append_prefix( $this->_priv_purge, true );
			$purge_header .= $private_prefix . implode( ',', $private_tags );
		}

return $purge_header;
	}

/**
	 * Append LS tag prefix to tags; handle '*' across network.
	 *
	 * @since 1.1.0
	 * @param array<int,string> $purge_tags Tags.
	 * @param bool              $is_private Private tags.
	 * @return array<int,string>
	 */
	private function _append_prefix( $purge_tags, $is_private = false ) {
		$curr_bid = is_multisite() ? get_current_blog_id() : '';

$purge_tags = apply_filters( 'litespeed_purge_tags', $purge_tags, $is_private );
		if ( ! in_array( '*', $purge_tags, true ) ) {
			$tags = [];
			foreach ( $purge_tags as $val ) {
				$tags[] = LSWCP_TAG_PREFIX . $val;
			}
			return $tags;
		}

// Purge All: maybe reset crawler.
		if ( ! $is_private && $this->conf( self::O_CRAWLER ) ) {
			Crawler::cls()->reset_pos();
		}

if ( ( defined( 'LSWCP_EMPTYCACHE' ) && LSWCP_EMPTYCACHE ) || $is_private ) {
			return [ '*' ];
		}

if ( is_multisite() && ! $this->_is_subsite_purge() ) {
			$blogs = Activation::get_network_ids();
			if ( empty( $blogs ) ) {
				self::debug( 'build_purge_headers: blog list is empty' );
				return [];
			}
			$tags = [];
			foreach ( $blogs as $blog_id ) {
				$tags[] = LSWCP_TAG_PREFIX . $blog_id . '_';
			}
			return $tags;
		}

return [ LSWCP_TAG_PREFIX . $curr_bid . '_' ];
	}

/**
	 * Check if this is a subsite purge in multisite.
	 *
	 * @since 4.0
	 * @return bool
	 */
	private function _is_subsite_purge() {
		if ( ! is_multisite() ) {
			return false;
		}

if ( is_network_admin() ) {
			return false;
		}

if ( defined( 'LSWCP_EMPTYCACHE' ) && LSWCP_EMPTYCACHE ) {
			return false;
		}

// Ajax network contexts.
		if ( Router::is_ajax() && ( check_ajax_referer( 'updates', false, false ) || check_ajax_referer( 'litespeed-purgeall-network', false, false ) ) ) {
			return false;
		}

return true;
	}

/**
	 * Get purge tags related to a post.
	 *
	 * @since 1.0.0
	 * @param int $post_id Post ID.
	 * @return array<int,string>
	 */
	private function _get_purge_tags_by_post( $post_id ) {
		if ( $this->conf( self::O_PURGE_POST_ALL ) ) {
			return [ '*' ];
		}

do_action( 'litespeed_api_purge_post', $post_id );

$purge_tags = [];

// Post itself.
		$purge_tags[] = Tag::TYPE_POST . $post_id;

$post_status = get_post_status( $post_id );
		if ( function_exists( 'is_post_status_viewable' ) && is_post_status_viewable( $post_status ) ) {
			$purge_tags[] = Tag::get_uri_tag( wp_make_link_relative( get_permalink( $post_id ) ) );
		}

// Avoid overriding global $post: use explicit post object.
		$the_post  = get_post( $post_id );
		$post_type = $the_post ? $the_post->post_type : '';

// Widgets: recent posts.
		global $wp_widget_factory;
		$recent_posts = isset( $wp_widget_factory->widgets['WP_Widget_Recent_Posts'] ) ? $wp_widget_factory->widgets['WP_Widget_Recent_Posts'] : null;
		if ( null !== $recent_posts ) {
			$purge_tags[] = Tag::TYPE_WIDGET . $recent_posts->id;
		}

// get adjacent posts id as related post tag
		if ( 'post' === $post_type ) {
			$prev_post = get_previous_post();
			$next_post = get_next_post();
			if ( ! empty( $prev_post->ID ) ) {
				$purge_tags[] = Tag::TYPE_POST . $prev_post->ID;
				self::debug( '--------purge_tags prev is: ' . $prev_post->ID );
			}
			if ( ! empty( $next_post->ID ) ) {
				$purge_tags[] = Tag::TYPE_POST . $next_post->ID;
				self::debug( '--------purge_tags next is: ' . $next_post->ID );
			}
		}

if ( $this->conf( self::O_PURGE_POST_TERM ) ) {
			$taxonomies = get_object_taxonomies( $post_type );
			// self::debug('purge by post, check tax = ' . var_export($taxonomies, true));
			foreach ( $taxonomies as $tax ) {
				$terms = get_the_terms( $post_id, $tax );
				if ( ! empty( $terms ) ) {
					foreach ( $terms as $term ) {
						$purge_tags[] = Tag::TYPE_ARCHIVE_TERM . $term->term_id;
					}
				}
			}
		}

if ( $this->conf( self::O_CACHE_TTL_FEED ) ) {
			$purge_tags[] = Tag::TYPE_FEED;
		}

// Author archives.
		if ( $this->conf( self::O_PURGE_POST_AUTHOR ) ) {
			$purge_tags[] = Tag::TYPE_AUTHOR . get_post_field( 'post_author', $post_id );
		}

// Post type archives.
		if ( $this->conf( self::O_PURGE_POST_POSTTYPE ) && get_post_type_archive_link( $post_type ) ) {
			$purge_tags[] = Tag::TYPE_ARCHIVE_POSTTYPE . $post_type;
			$purge_tags[] = $post_type;
		}

if ( $this->conf( self::O_PURGE_POST_FRONTPAGE ) ) {
			$purge_tags[] = Tag::TYPE_FRONTPAGE;
		}

if ( $this->conf( self::O_PURGE_POST_HOMEPAGE ) ) {
			$purge_tags[] = Tag::TYPE_HOME;
		}

if ( $this->conf( self::O_PURGE_POST_PAGES ) ) {
			$purge_tags[] = Tag::TYPE_PAGES;
		}

if ( $this->conf( self::O_PURGE_POST_PAGES_WITH_RECENT_POSTS ) ) {
			$purge_tags[] = Tag::TYPE_PAGES_WITH_RECENT_POSTS;
		}

// Date archives (use gmdate as per WPCS).
		$date_gmt = $the_post ? strtotime( $the_post->post_date_gmt ) : false;
		if ( $date_gmt ) {
			if ( $this->conf( self::O_PURGE_POST_DATE ) ) {
				$purge_tags[] = Tag::TYPE_ARCHIVE_DATE . gmdate( 'Ymd', $date_gmt );
			}
			if ( $this->conf( self::O_PURGE_POST_MONTH ) ) {
				$purge_tags[] = Tag::TYPE_ARCHIVE_DATE . gmdate( 'Ym', $date_gmt );
			}
			if ( $this->conf( self::O_PURGE_POST_YEAR ) ) {
				$purge_tags[] = Tag::TYPE_ARCHIVE_DATE . gmdate( 'Y', $date_gmt );
			}
		}

return array_unique( array_filter( $purge_tags ) );
	}

/**
	 * Run a filter and also purge all (utility for hooks).
	 *
	 * @since 1.1.5
	 * @param string $val Filter value.
	 * @return string Same value.
	 */
	public static function filter_with_purge_all( $val ) {
		self::purge_all();
		return $val;
	}
}

cmd: