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Editing: control.cls.php
<?php /** * The plugin cache-control class for X-LiteSpeed-Cache-Control. * * Provides helpers for determining cacheability, emitting cache-control headers, * and honoring various LiteSpeed Cache configuration options. * * @package LiteSpeed * @since 1.1.3 */ namespace LiteSpeed; defined( 'WPINC' ) || exit(); /** * Class Control * * Handles cache-control flags, TTL calculation, redirection checks, * role-based exclusions, and final header output. */ class Control extends Root { const LOG_TAG = '💵'; const BM_CACHEABLE = 1; const BM_PRIVATE = 2; const BM_SHARED = 4; const BM_NO_VARY = 8; const BM_FORCED_CACHEABLE = 32; const BM_PUBLIC_FORCED = 64; const BM_STALE = 128; const BM_NOTCACHEABLE = 256; const X_HEADER = 'X-LiteSpeed-Cache-Control'; /** * Bitmask control flags for current request. * * @var int */ protected static $_control = 0; /** * Custom TTL for current request (seconds). * * @var int */ protected static $_custom_ttl = 0; /** * Mapping of HTTP status codes to custom TTLs. * * @var array<string,int|string> */ private $_response_header_ttls = []; /** * Init cache control. * * @since 1.6.2 * @return void */ public function init() { /** * Add vary filter for Role Excludes. * * @since 1.6.2 */ add_filter( 'litespeed_vary', [ $this, 'vary_add_role_exclude' ] ); // 301 redirect hook. add_filter( 'wp_redirect', [ $this, 'check_redirect' ], 10, 2 ); // Load response header conf. $this->_response_header_ttls = $this->conf( Base::O_CACHE_TTL_STATUS ); foreach ( $this->_response_header_ttls as $k => $v ) { $v = explode( ' ', $v ); if ( empty( $v[0] ) || empty( $v[1] ) ) { continue; } $this->_response_header_ttls[ $v[0] ] = $v[1]; } if ( $this->conf( Base::O_PURGE_STALE ) ) { $this->set_stale(); } } /** * Exclude role from optimization filter. * * @since 1.6.2 * @access public * * @param array<string,mixed> $vary Existing vary map. * @return array<string,mixed> */ public function vary_add_role_exclude( $vary ) { if ( $this->in_cache_exc_roles() ) { $vary['role_exclude_cache'] = 1; } return $vary; } /** * Check if one user role is in exclude cache group settings. * * @since 1.6.2 * @since 3.0 Moved here from conf.cls * @access public * * @param string|null $role The user role. * @return string|false Comma-separated roles if set, otherwise false. */ public function in_cache_exc_roles( $role = null ) { // Get user role. if ( null === $role ) { $role = Router::get_role(); } if ( ! $role ) { return false; } $roles = explode( ',', $role ); $found = array_intersect( $roles, $this->conf( Base::O_CACHE_EXC_ROLES ) ); return $found ? implode( ',', $found ) : false; } /** * 1. Initialize cacheable status for `wp` hook * 2. Hook error page tags for cacheable pages * * @since 1.1.3 * @access public * @return void */ public function init_cacheable() { // Hook `wp` to mark default cacheable status. // NOTE: Any process that does NOT run into `wp` hook will not get cacheable by default. add_action( 'wp', [ $this, 'set_cacheable' ], 5 ); // Hook WP REST to be cacheable. if ( $this->conf( Base::O_CACHE_REST ) ) { add_action( 'rest_api_init', [ $this, 'set_cacheable' ], 5 ); } // AJAX cache. $ajax_cache = $this->conf( Base::O_CACHE_AJAX_TTL ); foreach ( $ajax_cache as $v ) { $v = explode( ' ', $v ); if ( empty( $v[0] ) || empty( $v[1] ) ) { continue; } add_action( 'wp_ajax_nopriv_' . $v[0], function () use ( $v ) { self::set_custom_ttl( $v[1] ); self::force_cacheable( 'ajax Cache setting for action ' . $v[0] ); }, 4 ); } // Check error page. add_filter( 'status_header', [ $this, 'check_error_codes' ], 10, 2 ); } /** * Check if the page returns any error code. * * @since 1.0.13.1 * @access public * * @param string $status_header Status header. * @param int $code HTTP status code. * @return string Original status header. */ public function check_error_codes( $status_header, $code ) { if ( array_key_exists( $code, $this->_response_header_ttls ) ) { if ( self::is_cacheable() && ! $this->_response_header_ttls[ $code ] ) { self::set_nocache( '[Ctrl] TTL is set to no cache [status_header] ' . $code ); } // Set TTL. self::set_custom_ttl( $this->_response_header_ttls[ $code ] ); } elseif ( self::is_cacheable() ) { $first = substr( $code, 0, 1 ); if ( '4' === $first || '5' === $first ) { self::set_nocache( '[Ctrl] 4xx/5xx default to no cache [status_header] ' . $code ); } } // Set cache tag. if ( in_array( $code, Tag::$error_code_tags, true ) ) { Tag::add( Tag::TYPE_HTTP . $code ); } // Give the default status_header back. return $status_header; } /** * Set no vary setting. * * @access public * @since 1.1.3 * @return void */ public static function set_no_vary() { if ( self::is_no_vary() ) { return; } self::$_control |= self::BM_NO_VARY; self::debug( 'X Cache_control -> no-vary', 3 ); } /** * Get no vary setting. * * @access public * @since 1.1.3 * @return bool */ public static function is_no_vary() { return self::$_control & self::BM_NO_VARY; } /** * Set stale. * * @access public * @since 1.1.3 * @return void */ public function set_stale() { if ( self::is_stale() ) { return; } self::$_control |= self::BM_STALE; self::debug( 'X Cache_control -> stale' ); } /** * Get stale. * * @access public * @since 1.1.3 * @return bool */ public static function is_stale() { return self::$_control & self::BM_STALE; } /** * Set cache control to shared private. * * @access public * @since 1.1.3 * * @param string|false $reason The reason to mark shared, or false. * @return void */ public static function set_shared( $reason = false ) { if ( self::is_shared() ) { return; } self::$_control |= self::BM_SHARED; self::set_private(); if ( ! is_string( $reason ) ) { $reason = false; } if ( $reason ) { $reason = "( $reason )"; } self::debug( 'X Cache_control -> shared ' . $reason ); } /** * Check if is shared private. * * @access public * @since 1.1.3 * @return bool */ public static function is_shared() { return (bool) ( self::$_control & self::BM_SHARED ) && self::is_private(); } /** * Set cache control to forced public. * * @access public * @since 1.7.1 * * @param string|false $reason Reason text or false. * @return void */ public static function set_public_forced( $reason = false ) { if ( self::is_public_forced() ) { return; } self::$_control |= self::BM_PUBLIC_FORCED; if ( ! is_string( $reason ) ) { $reason = false; } if ( $reason ) { $reason = "( $reason )"; } self::debug( 'X Cache_control -> public forced ' . $reason ); } /** * Check if is public forced. * * @access public * @since 1.7.1 * @return bool */ public static function is_public_forced() { return self::$_control & self::BM_PUBLIC_FORCED; } /** * Set cache control to private. * * @access public * @since 1.1.3 * * @param string|false $reason The reason to set private. * @return void */ public static function set_private( $reason = false ) { if ( self::is_private() ) { return; } self::$_control |= self::BM_PRIVATE; if ( ! is_string( $reason ) ) { $reason = false; } if ( $reason ) { $reason = "( $reason )"; } self::debug( 'X Cache_control -> private ' . $reason ); } /** * Check if is private. * * @access public * @since 1.1.3 * @return bool */ public static function is_private() { // if ( defined( 'LITESPEED_GUEST' ) && LITESPEED_GUEST ) { // return false; // } return (bool) ( self::$_control & self::BM_PRIVATE ) && ! self::is_public_forced(); } /** * Initialize cacheable status in `wp` hook, if not call this, by default it will be non-cacheable. * * @access public * @since 1.1.3 * * @param string|false $reason Reason text or false. * @return void */ public function set_cacheable( $reason = false ) { self::$_control |= self::BM_CACHEABLE; if ( ! is_string( $reason ) ) { $reason = false; } if ( $reason ) { $reason = ' [reason] ' . $reason; } self::debug( 'Cache_control init on' . $reason ); } /** * This will disable non-cacheable BM. * * @access public * @since 2.2 * * @param string|false $reason Reason text or false. * @return void */ public static function force_cacheable( $reason = false ) { self::$_control |= self::BM_FORCED_CACHEABLE; if ( ! is_string( $reason ) ) { $reason = false; } if ( $reason ) { $reason = ' [reason] ' . $reason; } self::debug( 'Forced cacheable' . $reason ); } /** * Switch to nocacheable status. * * @access public * @since 1.1.3 * * @param string|false $reason The reason to no cache. * @return void */ public static function set_nocache( $reason = false ) { self::$_control |= self::BM_NOTCACHEABLE; if ( ! is_string( $reason ) ) { $reason = false; } if ( $reason ) { $reason = "( $reason )"; } self::debug( 'X Cache_control -> no Cache ' . $reason, 5 ); } /** * Check current notcacheable bit set. * * @access public * @since 1.1.3 * @return bool True if notcacheable bit is set, otherwise false. */ public static function isset_notcacheable() { return self::$_control & self::BM_NOTCACHEABLE; } /** * Check current force cacheable bit set. * * @access public * @since 2.2 * @return bool */ public static function is_forced_cacheable() { return self::$_control & self::BM_FORCED_CACHEABLE; } /** * Check current cacheable status. * * @access public * @since 1.1.3 * @return bool True if is still cacheable, otherwise false. */ public static function is_cacheable() { if ( defined( 'LSCACHE_NO_CACHE' ) && LSCACHE_NO_CACHE ) { self::debug( 'LSCACHE_NO_CACHE constant defined' ); return false; } // Guest mode always cacheable // if ( defined( 'LITESPEED_GUEST' ) && LITESPEED_GUEST ) { // return true; // } // If it's forced public cacheable. if ( self::is_public_forced() ) { return true; } // If it's forced cacheable. if ( self::is_forced_cacheable() ) { return true; } return ! self::isset_notcacheable() && ( self::$_control & self::BM_CACHEABLE ); } /** * Set a custom TTL to use with the request if needed. * * @access public * @since 1.1.3 * * @param int|string $ttl An integer or numeric string to use as the TTL. * @param string|false $reason Optional reason text. * @return void */ public static function set_custom_ttl( $ttl, $reason = false ) { if ( is_numeric( $ttl ) ) { self::$_custom_ttl = (int) $ttl; self::debug( 'X Cache_control TTL -> ' . $ttl . ( $reason ? ' [reason] ' . $ttl : '' ) ); } } /** * Generate final TTL. * * @access public * @since 1.1.3 * @return int */ public function get_ttl() { if ( 0 !== self::$_custom_ttl ) { return (int) self::$_custom_ttl; } // Check if is in timed url list or not. $timed_urls = Utility::wildcard2regex( $this->conf( Base::O_PURGE_TIMED_URLS ) ); $timed_urls_time = $this->conf( Base::O_PURGE_TIMED_URLS_TIME ); if ( $timed_urls && $timed_urls_time ) { $current_url = Tag::build_uri_tag( true ); // Use time limit ttl. $scheduled_time = strtotime( $timed_urls_time ); $ttl = $scheduled_time - current_time('timestamp'); // phpcs:ignore WordPress.DateTime.CurrentTimeTimestamp if ( $ttl < 0 ) { $ttl += 86400; // add one day } foreach ( $timed_urls as $v ) { if ( false !== strpos( $v, '*' ) ) { if ( preg_match( '#' . $v . '#iU', $current_url ) ) { self::debug( 'X Cache_control TTL is limited to ' . $ttl . ' due to scheduled purge regex ' . $v ); return $ttl; } } elseif ( $v === $current_url ) { self::debug( 'X Cache_control TTL is limited to ' . $ttl . ' due to scheduled purge rule ' . $v ); return $ttl; } } } // Private cache uses private ttl setting. if ( self::is_private() ) { return (int) $this->conf( Base::O_CACHE_TTL_PRIV ); } if ( is_front_page() ) { return (int) $this->conf( Base::O_CACHE_TTL_FRONTPAGE ); } $feed_ttl = (int) $this->conf( Base::O_CACHE_TTL_FEED ); if ( is_feed() && $feed_ttl > 0 ) { return $feed_ttl; } if ( $this->cls( 'REST' )->is_rest() || $this->cls( 'REST' )->is_internal_rest() ) { return (int) $this->conf( Base::O_CACHE_TTL_REST ); } return (int) $this->conf( Base::O_CACHE_TTL_PUB ); } /** * Check if need to set no cache status for redirection or not. * * @access public * @since 1.1.3 * * @param string $location Redirect location. * @param int $status HTTP status. * @return string Redirect location. */ public function check_redirect( $location, $status ) { $script_uri = ''; if ( !empty( $_SERVER['SCRIPT_URI'] ) ) { $script_uri = sanitize_text_field( wp_unslash( $_SERVER['SCRIPT_URI'] ) ); } elseif ( !empty( $_SERVER['REQUEST_URI'] ) ) { $home = trailingslashit( home_url() ); $script_uri = $home . ltrim( sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ), '/' ); } if ( '' !== $script_uri ) { self::debug( '301 from ' . $script_uri ); self::debug( '301 to ' . $location ); $to_check = [ PHP_URL_SCHEME, PHP_URL_HOST, PHP_URL_PATH, PHP_URL_QUERY ]; $is_same_redirect = true; $query_string = ! empty( $_SERVER['QUERY_STRING'] ) ? sanitize_text_field( wp_unslash( $_SERVER['QUERY_STRING'] ) ) : ''; foreach ( $to_check as $v ) { $url_parsed = PHP_URL_QUERY === $v ? $query_string : wp_parse_url( $script_uri, $v ); $target = wp_parse_url( $location, $v ); self::debug( 'Compare [from] ' . $url_parsed . ' [to] ' . $target ); if ( PHP_URL_QUERY === $v ) { $url_parsed = $url_parsed ? urldecode( $url_parsed ) : ''; $target = $target ? urldecode( $target ) : ''; if ( '&' === substr( $url_parsed, -1 ) ) { $url_parsed = substr( $url_parsed, 0, -1 ); } } if ( $url_parsed !== $target ) { $is_same_redirect = false; self::debug( '301 different redirection' ); break; } } if ( $is_same_redirect ) { self::set_nocache( '301 to same url' ); } } return $location; } /** * Sets up the Cache Control header. * * @since 1.1.3 * @access public * @return string empty string if empty, otherwise the cache control header. */ public function output() { $esi_hdr = ''; if ( ESI::has_esi() ) { $esi_hdr = ',esi=on'; } $hdr = self::X_HEADER . ': '; // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase if ( defined( 'DONOTCACHEPAGE' ) && apply_filters( 'litespeed_const_DONOTCACHEPAGE', DONOTCACHEPAGE ) ) { self::debug( '❌ forced no cache [reason] DONOTCACHEPAGE const' ); $hdr .= 'no-cache' . $esi_hdr; return $hdr; } // Guest mode directly return cacheable result // if ( defined( 'LITESPEED_GUEST' ) && LITESPEED_GUEST ) { // If is POST, no cache // if ( defined( 'LSCACHE_NO_CACHE' ) && LSCACHE_NO_CACHE ) { // self::debug( "[Ctrl] ❌ forced no cache [reason] LSCACHE_NO_CACHE const" ); // $hdr .= 'no-cache'; // } // else if( $_SERVER[ 'REQUEST_METHOD' ] !== 'GET' ) { // self::debug( "[Ctrl] ❌ forced no cache [reason] req not GET" ); // $hdr .= 'no-cache'; // } // else { // $hdr .= 'public'; // $hdr .= ',max-age=' . $this->get_ttl(); // } // $hdr .= $esi_hdr; // return $hdr; // } // Fix cli `uninstall --deactivate` fatal err if (!self::is_cacheable()) { $hdr .= 'no-cache' . $esi_hdr; return $hdr; } if ( self::is_shared() ) { $hdr .= 'shared,private'; } elseif ( self::is_private() ) { $hdr .= 'private'; } else { $hdr .= 'public'; } if ( self::is_no_vary() ) { $hdr .= ',no-vary'; } $hdr .= ',max-age=' . $this->get_ttl() . $esi_hdr; return $hdr; } /** * Generate all `control` tags before output. * * @access public * @since 1.1.3 * @return void */ public function finalize() { // if ( defined( 'LITESPEED_GUEST' ) && LITESPEED_GUEST ) { // return; // } if ( is_preview() ) { self::set_nocache( 'preview page' ); return; } // Check if has metabox non-cacheable setting or not. if ( file_exists( LSCWP_DIR . 'src/metabox.cls.php' ) && $this->cls( 'Metabox' )->setting( 'litespeed_no_cache' ) ) { self::set_nocache( 'per post metabox setting' ); return; } // Check if URI is forced public cache. $excludes = $this->conf( Base::O_CACHE_FORCE_PUB_URI ); $req_uri = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : ''; $hit = Utility::str_hit_array( $req_uri, $excludes, true ); if ( $hit ) { list( $result, $this_ttl ) = $hit; self::set_public_forced( 'Setting: ' . $result ); self::debug( 'Forced public cacheable due to setting: ' . $result ); if ( $this_ttl ) { self::set_custom_ttl( $this_ttl ); } } if ( self::is_public_forced() ) { return; } // Check if URI is forced cache. $excludes = $this->conf( Base::O_CACHE_FORCE_URI ); $hit = Utility::str_hit_array( $req_uri, $excludes, true ); if ( $hit ) { list( $result, $this_ttl ) = $hit; self::force_cacheable(); self::debug( 'Forced cacheable due to setting: ' . $result ); if ( $this_ttl ) { self::set_custom_ttl( $this_ttl ); } } // if is not cacheable, terminate check. // Even no need to run 3rd party hook. if ( ! self::is_cacheable() ) { self::debug( 'not cacheable before ctrl finalize' ); return; } // Apply 3rd party filter. // NOTE: Hook always needs to run asap because some 3rd party set is_mobile in this hook. do_action( 'litespeed_control_finalize', defined( 'LSCACHE_IS_ESI' ) ? LSCACHE_IS_ESI : false ); // Pass ESI block id. // if is not cacheable, terminate check. if ( ! self::is_cacheable() ) { self::debug( 'not cacheable after api_control' ); return; } // Check litespeed setting to set cacheable status. if ( ! $this->_setting_cacheable() ) { self::set_nocache(); return; } // If user has password cookie, do not cache (moved from vary). global $post; if ( ! empty( $post->post_password ) && isset( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] ) ) { self::set_nocache( 'pswd cookie' ); return; } // The following check to the end is ONLY for mobile. $is_mobile_conf = apply_filters( 'litespeed_is_mobile', false ); if ( ! $this->conf( Base::O_CACHE_MOBILE ) ) { if ( $is_mobile_conf ) { self::set_nocache( 'mobile' ); } return; } $env_vary = isset( $_SERVER['LSCACHE_VARY_VALUE'] ) ? sanitize_text_field( wp_unslash( $_SERVER['LSCACHE_VARY_VALUE'] ) ) : ''; if ( !$env_vary && isset( $_SERVER['HTTP_X_LSCACHE_VARY_VALUE'] ) ) { $env_vary = sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_LSCACHE_VARY_VALUE'] ) ); } if ( $env_vary && false !== strpos( $env_vary, 'ismobile' ) ) { if ( ! wp_is_mobile() && ! $is_mobile_conf ) { self::set_nocache( 'is not mobile' ); // todo: no need to uncache, it will correct vary value in vary finalize anyways. return; } } elseif ( wp_is_mobile() || $is_mobile_conf ) { self::set_nocache( 'is mobile' ); return; } } /** * Check if is mobile for filter `litespeed_is_mobile` in API. * * @since 3.0 * @access public * @return bool */ public static function is_mobile() { return wp_is_mobile(); } /** * Get request method w/ compatibility to X-Http-Method-Override. * * @since 6.2 * @return string */ private function _get_req_method() { if ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) { $override = sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ); self::debug( 'X-Http-Method-Override -> ' . $override ); if ( ! defined( 'LITESPEED_X_HTTP_METHOD_OVERRIDE' ) ) { define( 'LITESPEED_X_HTTP_METHOD_OVERRIDE', true ); } return $override; } if ( isset( $_SERVER['REQUEST_METHOD'] ) ) { return sanitize_text_field( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ); } return 'unknown'; } /** * Check if a page is cacheable based on litespeed setting. * * @since 1.0.0 * @access private * @return bool True if cacheable, false otherwise. */ private function _setting_cacheable() { // logged_in users already excluded, no hook added. // phpcs:ignore WordPress.Security.NonceVerification.Recommended if ( ! empty( $_REQUEST[ Router::ACTION ] ) ) { return $this->_no_cache_for( 'Query String Action' ); } $method = $this->_get_req_method(); if ( defined( 'LITESPEED_X_HTTP_METHOD_OVERRIDE' ) && LITESPEED_X_HTTP_METHOD_OVERRIDE && 'HEAD' === $method ) { return $this->_no_cache_for( 'HEAD method from override' ); } if ( 'GET' !== $method && 'HEAD' !== $method ) { return $this->_no_cache_for( 'Not GET method: ' . $method ); } if ( is_feed() && 0 === $this->conf( Base::O_CACHE_TTL_FEED ) ) { return $this->_no_cache_for( 'feed' ); } if ( is_trackback() ) { return $this->_no_cache_for( 'trackback' ); } if ( is_search() ) { return $this->_no_cache_for( 'search' ); } // Check private cache URI setting. $excludes = $this->conf( Base::O_CACHE_PRIV_URI ); $req_uri = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : ''; $result = Utility::str_hit_array( $req_uri, $excludes ); if ( $result ) { self::set_private( 'Admin cfg Private Cached URI: ' . $result ); } if ( ! self::is_forced_cacheable() ) { // Check if URI is excluded from cache. $excludes = $this->cls( 'Data' )->load_cache_nocacheable( $this->conf( Base::O_CACHE_EXC ) ); $result = Utility::str_hit_array( $req_uri, $excludes ); if ( $result ) { return $this->_no_cache_for( 'Admin configured URI Do not cache: ' . $result ); } // Check QS excluded setting. $excludes = $this->conf( Base::O_CACHE_EXC_QS ); $qs_hit = $this->_is_qs_excluded( $excludes ); if ( ! empty( $excludes ) && $qs_hit ) { return $this->_no_cache_for( 'Admin configured QS Do not cache: ' . $qs_hit ); } $excludes = $this->conf( Base::O_CACHE_EXC_CAT ); if ( ! empty( $excludes ) && has_category( $excludes ) ) { return $this->_no_cache_for( 'Admin configured Category Do not cache.' ); } $excludes = $this->conf( Base::O_CACHE_EXC_TAG ); if ( ! empty( $excludes ) && has_tag( $excludes ) ) { return $this->_no_cache_for( 'Admin configured Tag Do not cache.' ); } $excludes = $this->conf( Base::O_CACHE_EXC_COOKIES ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- names only, compared as keys. if ( ! empty( $excludes ) && ! empty( $_COOKIE ) ) { $cookie_hit = array_intersect( array_keys( $_COOKIE ), $excludes ); if ( $cookie_hit ) { return $this->_no_cache_for( 'Admin configured Cookie Do not cache.' ); } } $excludes = $this->conf( Base::O_CACHE_EXC_USERAGENTS ); if ( ! empty( $excludes ) && isset( $_SERVER['HTTP_USER_AGENT'] ) ) { $nummatches = preg_match( Utility::arr2regex( $excludes ), sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) ); if ( $nummatches ) { return $this->_no_cache_for( 'Admin configured User Agent Do not cache.' ); } } // Check if is exclude roles ( Need to set Vary too ). $result = $this->in_cache_exc_roles(); if ( $result ) { return $this->_no_cache_for( 'Role Excludes setting ' . $result ); } } return true; } /** * Write a debug message for if a page is not cacheable. * * @since 1.0.0 * @access private * * @param string $reason An explanation for why the page is not cacheable. * @return bool Always false. */ private function _no_cache_for( $reason ) { self::debug( 'X Cache_control off - ' . $reason ); return false; } /** * Check if current request has qs excluded setting. * * @since 1.3 * @access private * * @param array<int,string> $excludes QS excludes setting. * @return bool|string False if not excluded, otherwise the hit qs list. */ private function _is_qs_excluded( $excludes ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended if ( ! empty( $_GET ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended $keys = array_keys( $_GET ); $intersect = array_intersect( $keys, $excludes ); if ( $intersect ) { return implode( ',', $intersect ); } } return false; } }
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