<?php
/**
* Handles disk-cache-related operations.
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
class autoptimizeCache
{
/**
* Cache filename.
*
* @var string
*/
private $filename;
/**
* Cache directory path (with a trailing slash).
*
* @var string
*/
private $cachedir;
/**
* Whether gzipping is done by the web server or us.
* True => we don't gzip, the web server does it.
* False => we do it ourselves.
*
* @var bool
*/
private $nogzip;
/**
* Ctor.
*
* @param string $md5 Hash.
* @param string $ext Extension.
*/
public function __construct( $md5, $ext = 'php' )
{
$_min_ext = '';
if ( apply_filters( 'autoptimize_filter_cache_url_add_min_ext', false ) ) {
$_min_ext = '.min';
}
$this->cachedir = AUTOPTIMIZE_CACHE_DIR;
$this->nogzip = AUTOPTIMIZE_CACHE_NOGZIP;
if ( ! $this->nogzip ) {
$this->filename = AUTOPTIMIZE_CACHEFILE_PREFIX . $md5 . $_min_ext . '.php';
} else {
if ( in_array( $ext, array( 'js', 'css' ) ) ) {
$this->filename = $ext . '/' . AUTOPTIMIZE_CACHEFILE_PREFIX . $md5 . $_min_ext . '.' . $ext;
} else {
$this->filename = AUTOPTIMIZE_CACHEFILE_PREFIX . $md5 . $_min_ext . '.' . $ext;
}
}
}
/**
* Returns true if the cached file exists on disk.
*
* @return bool
*/
public function check()
{
return file_exists( $this->cachedir . $this->filename );
}
/**
* Returns cache contents if they exist, false otherwise.
*
* @return string|false
*/
public function retrieve()
{
if ( $this->check() ) {
if ( false == $this->nogzip ) {
return file_get_contents( $this->cachedir . $this->filename . '.none' );
} else {
return file_get_contents( $this->cachedir . $this->filename );
}
}
return false;
}
/**
* Stores given $data in cache.
*
* @param string $data Data to cache.
* @param string $mime Mimetype.
*
* @return void|bool
*/
public function cache( $data, $mime )
{
// readonly FS explicitly OK'ed by developer, so just pretend all is OK.
if ( defined( 'AUTOPTIMIZE_CACHE_READONLY' ) ) {
return true;
}
// off by default; check if cachedirs exist every time before caching
//
// to be activated for users that experience these ugly errors;
// PHP Warning: file_put_contents failed to open stream: No such file or directory.
if ( apply_filters( 'autoptimize_filter_cache_checkdirs_on_write', false ) ) {
$this->check_and_create_dirs();
}
if ( false === $this->nogzip ) {
// We handle gzipping ourselves.
$file = 'default.php';
$phpcode = file_get_contents( AUTOPTIMIZE_PLUGIN_DIR . 'config/' . $file );
$phpcode = str_replace( array( '%%CONTENT%%', 'exit;' ), array( $mime, '' ), $phpcode );
file_put_contents( $this->cachedir . $this->filename, $phpcode );
file_put_contents( $this->cachedir . $this->filename . '.none', $data );
} else {
// Write code to cache without doing anything else.
file_put_contents( $this->cachedir . $this->filename, $data );
// save fallback .js or .css file if filter true (to be false by default) but not if snippet or single.
if ( self::do_fallback() && strpos( $this->filename, '_snippet_' ) === false && strpos( $this->filename, '_single_' ) === false ) {
$_extension = pathinfo( $this->filename, PATHINFO_EXTENSION );
$_fallback_file = AUTOPTIMIZE_CACHEFILE_PREFIX . 'fallback.' . $_extension;
if ( ( 'css' === $_extension || 'js' === $_extension ) && ! file_exists( $this->cachedir . $_extension . '/' . $_fallback_file ) ) {
file_put_contents( $this->cachedir . $_extension . '/' . $_fallback_file, $data );
}
}
if ( apply_filters( 'autoptimize_filter_cache_create_static_gzip', false ) ) {
// Create an additional cached gzip file.
file_put_contents( $this->cachedir . $this->filename . '.gz', gzencode( $data, 9, FORCE_GZIP ) );
// If PHP Brotli extension is installed, create an additional cached Brotli file.
if ( function_exists( 'brotli_compress' ) ) {
file_put_contents( $this->cachedir . $this->filename . '.br', brotli_compress( $data, 11, BROTLI_GENERIC ) );
}
}
}
// Provide 3rd party action hook for every cache file that is created.
// This hook can for example be used to inject a copy of the created cache file to a other domain.
do_action( 'autoptimize_action_cache_file_created', $this->cachedir . $this->filename );
}
/**
* Get cache filename.
*
* @return string
*/
public function getname()
{
// NOTE: This could've maybe been a do_action() instead, however,
// that ship has sailed.
// The original idea here was to provide 3rd party code a hook so that
// it can "listen" to all the complete autoptimized-urls that the page
// will emit... Or something to that effect I think?
apply_filters( 'autoptimize_filter_cache_getname', AUTOPTIMIZE_CACHE_URL . $this->filename );
return $this->filename;
}
/**
* Returns true if given `$file` is considered a valid Autoptimize cache file,
* false otherwise.
*
* @param string $dir Directory name (with a trailing slash).
* @param string $file Filename.
* @return bool
*/
protected static function is_valid_cache_file( $dir, $file )
{
if ( '.' !== $file && '..' !== $file &&
false !== strpos( $file, AUTOPTIMIZE_CACHEFILE_PREFIX ) &&
is_file( $dir . $file ) ) {
// It's a valid file!
return true;
}
// Everything else is considered invalid!
return false;
}
/**
* Clears contents of AUTOPTIMIZE_CACHE_DIR.
*
* @return void
*/
protected static function clear_cache_classic()
{
$contents = self::get_cache_contents();
foreach ( $contents as $name => $files ) {
$dir = rtrim( AUTOPTIMIZE_CACHE_DIR . $name, '/' ) . '/';
foreach ( $files as $file ) {
if ( self::is_valid_cache_file( $dir, $file ) ) {
@unlink( $dir . $file ); // @codingStandardsIgnoreLine
}
}
}
@unlink( AUTOPTIMIZE_CACHE_DIR . '/.htaccess' ); // @codingStandardsIgnoreLine
}
/**
* Recursively deletes the specified pathname (file/directory) if possible.
* Returns true on success, false otherwise.
*
* @param string $pathname Pathname to remove.
*
* @return bool
*/
protected static function rmdir( $pathname )
{
$files = self::get_dir_contents( $pathname );
foreach ( $files as $file ) {
$path = $pathname . '/' . $file;
if ( is_dir( $path ) ) {
self::rmdir( $path );
} else {
unlink( $path );
}
}
return rmdir( $pathname );
}
/**
* Clears contents of AUTOPTIMIZE_CACHE_DIR by renaming the current
* cache directory into a new one with a unique name and then
* re-creating the default (empty) cache directory.
*
* Important/ Fixme: this does not take multisite into account, so
* if advanced_cache_clear_enabled is true (it is not by default)
* then the content for all subsites is zapped!
*
* @return bool Returns true when everything is done successfully, false otherwise.
*/
protected static function clear_cache_via_rename()
{
$ok = false;
$dir = self::get_pathname_base();
$new_name = self::get_unique_name();
// Makes sure the new pathname is on the same level...
$new_pathname = dirname( $dir ) . '/' . $new_name;
$renamed = @rename( $dir, $new_pathname ); // @codingStandardsIgnoreLine
// When renamed, re-create the default cache directory back so it's
// available again...
if ( $renamed ) {
$ok = self::cacheavail();
}
return $ok;
}
/**
* Returns true when advanced cache clearing is enabled.
*
* @return bool
*/
public static function advanced_cache_clear_enabled()
{
return apply_filters( 'autoptimize_filter_cache_clear_advanced', false );
}
/**
* Returns a (hopefully) unique new cache folder name for renaming purposes.
*
* @return string
*/
protected static function get_unique_name()
{
$prefix = self::get_advanced_cache_clear_prefix();
$new_name = uniqid( $prefix, true );
return $new_name;
}
/**
* Get cache prefix name used in advanced cache clearing mode.
*
* @return string
*/
protected static function get_advanced_cache_clear_prefix()
{
$pathname = self::get_pathname_base();
$basename = basename( $pathname );
$prefix = $basename . '-artifact-';
return $prefix;
}
/**
* Returns an array of file and directory names found within
* the given $pathname without '.' and '..' elements.
*
* @param string $pathname Pathname.
*
* @return array
*/
protected static function get_dir_contents( $pathname )
{
return array_slice( scandir( $pathname ), 2 );
}
/**
* Wipes directories which were created as part of the fast cache clearing
* routine (which renames the current cache directory into a new one with
* a custom-prefixed unique name).
*
* @return bool
*/
public static function delete_advanced_cache_clear_artifacts()
{
// Don't go through these motions (called from the cachechecker) if advanced cache clear isn't even active.
if ( ! self::advanced_cache_clear_enabled() ) {
return false;
}
$dir = self::get_pathname_base();
$prefix = self::get_advanced_cache_clear_prefix();
$parent = dirname( $dir );
$ok = false;
// Returns the list of files without '.' and '..' elements.
$files = self::get_dir_contents( $parent );
if ( is_array( $files ) && ! empty( $files ) ) {
foreach ( $files as $file ) {
$path = $parent . '/' . $file;
$prefixed = ( false !== strpos( $path, $prefix ) );
// Removing only our own (prefixed) directories...
if ( is_dir( $path ) && $prefixed ) {
$ok = self::rmdir( $path );
}
}
}
return $ok;
}
/**
* Returns the cache directory pathname used.
* Done as a function so we canSlightly different
* if multisite is used and `autoptimize_separate_blog_caches` filter
* is used.
*
* @return string
*/
public static function get_pathname()
{
$pathname = self::get_pathname_base();
if ( is_multisite() && apply_filters( 'autoptimize_separate_blog_caches', true ) ) {
$blog_id = get_current_blog_id();
$pathname .= $blog_id . '/';
}
return $pathname;
}
/**
* Returns the base path of our cache directory.
*
* @return string
*/
protected static function get_pathname_base()
{
$pathname = WP_CONTENT_DIR . AUTOPTIMIZE_CACHE_CHILD_DIR;
return $pathname;
}
/**
* Deletes everything from the cache directories.
*
* @param bool $propagate Whether to trigger additional actions when cache is purged.
*
* @return bool
*/
public static function clearall( $propagate = true )
{
if ( defined( 'ET_CORE_VERSION' ) && 'Divi' === get_template() ) {
// see https://blog.futtta.be/2018/11/17/warning-divi-purging-autoptimizes-cache/ .
$dbt = debug_backtrace( DEBUG_BACKTRACE_IGNORE_ARGS, 2 );
$caller = isset( $dbt[1]['function'] ) ? $dbt[1]['function'] : null;
if ( 'et_core_clear_wp_cache' === $caller ) {
if ( apply_filters( 'autoptimize_filter_cache_divi_wrong_complain', true ) ) {
_doing_it_wrong( 'autoptimizeCache::clearall', 'Divi devs: please don\'t clear Autoptimize\'s cache, it is unneeded and can break sites. You can contact me at futtta@gmail.com to discuss.', 'Autoptimize 2.9.6' );
}
return false;
}
}
if ( ! self::cacheavail() || true === apply_filters( 'autoptimize_filter_cache_clearall_disabled', false ) ) {
return false;
}
// TODO/FIXME: If cache is big, switch to advanced/new cache clearing automatically?
if ( self::advanced_cache_clear_enabled() ) {
self::clear_cache_via_rename();
} else {
self::clear_cache_classic();
}
// Remove 404 handler if required.
if ( self::do_fallback() ) {
$_fallback_php = trailingslashit( WP_CONTENT_DIR ) . 'autoptimize_404_handler.php';
@unlink( $_fallback_php ); // @codingStandardsIgnoreLine
}
// Remove the transient so it gets regenerated...
delete_transient( 'autoptimize_stats' );
// Cache was just purged, clear page cache and allow others to hook into our purging...
if ( true === $propagate ) {
if ( ! function_exists( 'autoptimize_do_cachepurged_action' ) ) {
function autoptimize_do_cachepurged_action() {
do_action( 'autoptimize_action_cachepurged' );
}
}
add_action( 'shutdown', 'autoptimize_do_cachepurged_action', 11 );
add_action( 'autoptimize_action_cachepurged', array( 'autoptimizeCache', 'flushPageCache' ), 10, 0 );
}
// Warm cache (part of speedupper)!
if ( apply_filters( 'autoptimize_filter_speedupper', true ) && false == get_transient( 'autoptimize_cache_warmer_protector' ) ) {
set_transient( 'autoptimize_cache_warmer_protector', 'I shall not warm cache for another 10 minutes.', 60 * 10 );
$url = site_url() . '/?ao_speedup_cachebuster=' . rand( 1, 100000 );
$url = apply_filters( 'autoptimize_filter_cache_warmer_url', $url );
$cache = @wp_remote_get( $url ); // @codingStandardsIgnoreLine
unset( $cache );
}
return true;
}
/**
* Wrapper for clearall but with false param
* to ensure the event is not propagated to others
* through our own hooks (to avoid infinite loops).
*
* @return bool
*/
public static function clearall_actionless()
{
return self::clearall( false );
}
/**
* Returns the contents of our cache dirs.
*
* @return array
*/
protected static function get_cache_contents()
{
$contents = array();
foreach ( array( '', 'js', 'css' ) as $dir ) {
$contents[ $dir ] = scandir( AUTOPTIMIZE_CACHE_DIR . $dir );
}
return $contents;
}
/**
* Returns stats about cached contents.
*
* @return array
*/
public static function stats()
{
$stats = get_transient( 'autoptimize_stats' );
// If no transient, do the actual scan!
if ( ! is_array( $stats ) ) {
if ( ! self::cacheavail() ) {
return 0;
}
$stats = self::stats_scan();
$count = $stats[0];
if ( $count > 100 ) {
// Store results in transient.
set_transient(
'autoptimize_stats',
$stats,
apply_filters( 'autoptimize_filter_cache_statsexpiry', HOUR_IN_SECONDS )
);
}
}
return $stats;
}
/**
* Performs a scan of cache directory contents and returns an array
* with 3 values: count, size, timestamp.
* count = total number of found files
* size = total filesize (in bytes) of found files
* timestamp = unix timestamp when the scan was last performed/finished.
*
* @return array
*/
protected static function stats_scan()
{
$count = 0;
$size = 0;
// Scan everything in our cache directories.
foreach ( self::get_cache_contents() as $name => $files ) {
$dir = rtrim( AUTOPTIMIZE_CACHE_DIR . $name, '/' ) . '/';
foreach ( $files as $file ) {
if ( self::is_valid_cache_file( $dir, $file ) ) {
if ( AUTOPTIMIZE_CACHE_NOGZIP &&
(
false !== strpos( $file, '.js' ) ||
false !== strpos( $file, '.css' ) ||
false !== strpos( $file, '.img' ) ||
false !== strpos( $file, '.txt' )
)
) {
// Web server is gzipping, we count .js|.css|.img|.txt files.
$count++;
} elseif ( ! AUTOPTIMIZE_CACHE_NOGZIP && false !== strpos( $file, '.none' ) ) {
// We are gzipping ourselves via php, counting only .none files.
$count++;
}
$size += filesize( $dir . $file );
}
}
}
$stats = array( $count, $size, time() );
return $stats;
}
/**
* Ensures the cache directory exists, is writeable and contains the
* required .htaccess files.
* Returns false in case it fails to ensure any of those things.
*
* @return bool
*/
public static function cacheavail()
{
// readonly FS explicitly OK'ed by dev, let's assume the cache dirs are there!
if ( defined( 'AUTOPTIMIZE_CACHE_READONLY' ) ) {
return true;
}
if ( false === autoptimizeCache::check_and_create_dirs() ) {
return false;
}
// Using .htaccess inside our cache folder to overrule wp-super-cache.
$htaccess = AUTOPTIMIZE_CACHE_DIR . '/.htaccess';
if ( ! is_file( $htaccess ) ) {
/**
* Create `wp-content/AO_htaccess_tmpl` file with
* whatever htaccess rules you might need
* if you want to override default AO htaccess
*/
$htaccess_tmpl = WP_CONTENT_DIR . '/AO_htaccess_tmpl';
if ( is_file( $htaccess_tmpl ) ) {
$content = file_get_contents( $htaccess_tmpl );
} elseif ( is_multisite() || ! AUTOPTIMIZE_CACHE_NOGZIP ) {
$content = '<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/css A30672000
ExpiresByType text/javascript A30672000
ExpiresByType application/javascript A30672000
</IfModule>
<IfModule mod_headers.c>
Header append Cache-Control "public, immutable"
</IfModule>
<IfModule mod_deflate.c>
<FilesMatch "\.(js|css)$">
SetOutputFilter DEFLATE
</FilesMatch>
</IfModule>
<IfModule mod_authz_core.c>
<Files *.php>
Require all granted
</Files>
</IfModule>
<IfModule !mod_authz_core.c>
<Files *.php>
Order allow,deny
Allow from all
</Files>
</IfModule>';
} else {
$content = '<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/css A30672000
ExpiresByType text/javascript A30672000
ExpiresByType application/javascript A30672000
</IfModule>
<IfModule mod_headers.c>
Header append Cache-Control "public, immutable"
</IfModule>
<IfModule mod_deflate.c>
<FilesMatch "\.(js|css)$">
SetOutputFilter DEFLATE
</FilesMatch>
</IfModule>
<IfModule mod_authz_core.c>
<Files *.php>
Require all denied
</Files>
</IfModule>
<IfModule !mod_authz_core.c>
<Files *.php>
Order deny,allow
Deny from all
</Files>
</IfModule>';
}
if ( self::do_fallback() === true ) {
$content .= "\nErrorDocument 404 " . trailingslashit( parse_url( content_url(), PHP_URL_PATH ) ) . 'autoptimize_404_handler.php';
}
@file_put_contents( $htaccess, $content ); // @codingStandardsIgnoreLine
}
if ( self::do_fallback() ) {
self::check_fallback_php();
}
// All OK!
return true;
}
/**
* Checks if fallback-php file exists and create it if not.
*
* Return bool
*/
public static function check_fallback_php() {
$_fallback_filename = 'autoptimize_404_handler.php';
$_fallback_php = trailingslashit( WP_CONTENT_DIR ) . $_fallback_filename;
$_fallback_status = true;
if ( ! file_exists( $_fallback_php ) && is_writable( WP_CONTENT_DIR ) ) {
$_fallback_php_contents = file_get_contents( AUTOPTIMIZE_PLUGIN_DIR . 'config/' . $_fallback_filename );
$_fallback_php_contents = str_replace( '<?php exit;', '<?php', $_fallback_php_contents );
$_fallback_php_contents = str_replace( '<!--ao-cache-dir-->', AUTOPTIMIZE_CACHE_DIR, $_fallback_php_contents );
$_fallback_php_contents = str_replace( '<!--ao-cachefile-prefix-->', AUTOPTIMIZE_CACHEFILE_PREFIX, $_fallback_php_contents );
if ( is_multisite() ) {
$_fallback_php_contents = str_replace( '$multisite = false;', '$multisite = true;', $_fallback_php_contents );
}
if ( apply_filters( 'autoptimize_filter_cache_fallback_log_errors', false ) ) {
$_fallback_php_contents = str_replace( '// error_log', 'error_log', $_fallback_php_contents );
}
$_fallback_status = file_put_contents( $_fallback_php, $_fallback_php_contents );
}
return $_fallback_status;
}
/**
* Tells if AO should try to avoid 404's by creating fallback filesize
* and create a php 404 handler and tell .htaccess to redirect to said handler
* and hook into WordPress to redirect 404 to said handler as well. NGINX users
* are smart enough to get this working, no? ;-)
*
* Return bool
*/
public static function do_fallback() {
static $_do_fallback = null;
if ( null === $_do_fallback ) {
$_do_fallback = (bool) apply_filters( 'autoptimize_filter_cache_do_fallback', autoptimizeOptionWrapper::get_option( 'autoptimize_cache_fallback', '1' ) );
}
return $_do_fallback;
}
/**
* Hooks into template_redirect, will act on 404-ing requests for
* Autoptimized files and redirects to the fallback CSS/ JS if available
* and 410'ing ("Gone") if fallback not available.
*/
public static function wordpress_notfound_fallback() {
$original_request = strtok( $_SERVER['REQUEST_URI'], '?' );
if ( strpos( $original_request, wp_basename( WP_CONTENT_DIR ) . AUTOPTIMIZE_CACHE_CHILD_DIR ) !== false && is_404() ) {
// make sure this is not considered a 404.
global $wp_query;
$wp_query->is_404 = false;
// set fallback path.
$js_or_css = pathinfo( $original_request, PATHINFO_EXTENSION );
$fallback_path = AUTOPTIMIZE_CACHE_DIR . $js_or_css . '/autoptimize_fallback.' . $js_or_css;
// prepare for Shakeeb's Unused CSS files to be 404-handled as well.
if ( strpos( $original_request, 'uucss/uucss-' ) !== false ) {
$original_request = preg_replace( '/uucss\/uucss-[a-z0-9]{32}-/', 'css/', $original_request );
}
// set fallback URL.
$fallback_target = preg_replace( '/(.*)_(?:[a-z0-9]{32})\.(js|css)$/', '${1}_fallback.${2}', $original_request );
// redirect to fallback if possible.
if ( $original_request !== $fallback_target && file_exists( $fallback_path ) ) {
// redirect to fallback.
wp_redirect( $fallback_target, 302 );
} else {
// return HTTP 410 (gone) reponse.
status_header( 410 );
}
}
}
/**
* Checks if cache dirs exist and create if not.
* Returns false if not succesful.
*
* @return bool
*/
public static function check_and_create_dirs() {
if ( ! defined( 'AUTOPTIMIZE_CACHE_DIR' ) ) {
// We didn't set a cache.
return false;
}
foreach ( array( '', 'js', 'css' ) as $dir ) {
if ( ! self::check_cache_dir( AUTOPTIMIZE_CACHE_DIR . $dir ) ) {
return false;
}
}
return true;
}
/**
* Ensures the specified `$dir` exists and is writeable.
* Returns false if that's not the case.
*
* @param string $dir Directory to check/create.
*
* @return bool
*/
protected static function check_cache_dir( $dir )
{
// Try creating the dir if it doesn't exist.
if ( ! file_exists( $dir ) ) {
@mkdir( $dir, 0775, true ); // @codingStandardsIgnoreLine
if ( ! file_exists( $dir ) ) {
return false;
}
}
// If we still cannot write, bail.
if ( ! is_writable( $dir ) ) {
return false;
}
// Create an index.html in there to avoid prying eyes!
$idx_file = rtrim( $dir, '/\\' ) . '/index.html';
if ( ! is_file( $idx_file ) ) {
@file_put_contents( $idx_file, '<html><head><meta name="robots" content="noindex, nofollow"></head><body>Generated by <a href="http://wordpress.org/extend/plugins/autoptimize/" rel="nofollow">Autoptimize</a></body></html>' ); // @codingStandardsIgnoreLine
}
return true;
}
/**
* Flushes as many page cache plugin's caches as possible.
*
* @return void
*/
// @codingStandardsIgnoreStart
public static function flushPageCache()
{
if ( function_exists( 'wp_cache_clear_cache' ) ) {
if ( is_multisite() ) {
$blog_id = get_current_blog_id();
wp_cache_clear_cache( $blog_id );
} else {
wp_cache_clear_cache();
}
} elseif ( has_action( 'cachify_flush_cache' ) ) {
do_action( 'cachify_flush_cache' );
} elseif ( function_exists( 'w3tc_pgcache_flush' ) ) {
w3tc_pgcache_flush();
} elseif ( function_exists( 'wp_fast_cache_bulk_delete_all' ) ) {
wp_fast_cache_bulk_delete_all();
} elseif ( function_exists( 'rapidcache_clear_cache' ) ) {
rapidcache_clear_cache();
} elseif ( class_exists( 'Swift_Performance_Cache' ) ) {
Swift_Performance_Cache::clear_all_cache();
} elseif ( class_exists( 'WpFastestCache' ) ) {
$wpfc = new WpFastestCache();
$wpfc->deleteCache();
} elseif ( class_exists( 'c_ws_plugin__qcache_purging_routines' ) ) {
c_ws_plugin__qcache_purging_routines::purge_cache_dir(); // quick cache
} elseif ( class_exists( 'zencache' ) ) {
zencache::clear();
} elseif ( class_exists( 'comet_cache' ) ) {
comet_cache::clear();
} elseif ( class_exists( 'WpeCommon' ) ) {
// WPEngine cache purge/flush methods to call by default
$wpe_methods = array(
'purge_varnish_cache',
);
// More agressive clear/flush/purge behind a filter
if ( apply_filters( 'autoptimize_flush_wpengine_aggressive', false ) ) {
$wpe_methods = array_merge( $wpe_methods, array( 'purge_memcached', 'clear_maxcdn_cache' ) );
}
// Filtering the entire list of WpeCommon methods to be called (for advanced usage + easier testing)
$wpe_methods = apply_filters( 'autoptimize_flush_wpengine_methods', $wpe_methods );
foreach ( $wpe_methods as $wpe_method ) {
if ( method_exists( 'WpeCommon', $wpe_method ) ) {
WpeCommon::$wpe_method();
}
}
} elseif ( function_exists( 'sg_cachepress_purge_cache' ) ) {
sg_cachepress_purge_cache();
} elseif ( array_key_exists( 'KINSTA_CACHE_ZONE', $_SERVER ) ) {
$_kinsta_clear_cache_url = 'https://localhost/kinsta-clear-cache-all';
$_kinsta_response = wp_remote_get(
$_kinsta_clear_cache_url,
array(
'sslverify' => false,
'timeout' => 5,
)
);
} elseif ( class_exists( 'RaidboxesNginxCacheFunctions' ) ) {
$rb_cache_helper = new RaidboxesNginxCacheFunctions();
$rb_cache_helper->purge_cache();
} elseif ( defined('NGINX_HELPER_BASENAME') ) {
do_action( 'rt_nginx_helper_purge_all' );
} elseif ( file_exists( WP_CONTENT_DIR . '/wp-cache-config.php' ) && function_exists( 'prune_super_cache' ) ) {
// fallback for WP-Super-Cache
global $cache_path;
if ( is_multisite() ) {
$blog_id = get_current_blog_id();
prune_super_cache( get_supercache_dir( $blog_id ), true );
prune_super_cache( $cache_path . 'blogs/', true );
} else {
prune_super_cache( $cache_path . 'supercache/', true );
prune_super_cache( $cache_path, true );
}
} elseif ( class_exists( 'NginxCache' ) ) {
$nginx_cache = new NginxCache();
$nginx_cache->purge_zone_once();
}
}
// @codingStandardsIgnoreEnd
}