<p style='color:red'>❌ domains folder not found.</p><h2>✏️ Editing: Cdnfsd_CacheFlush.php</h2><form method='post'>
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/**
 * File: Cdnfsd_CacheFlush.php
 *
 * @package W3TC
 */

namespace W3TC;

/**
 * Class: Cdnfsd_CacheFlush
 */
class Cdnfsd_CacheFlush {
	/**
	 * Array of urls to flush.
	 *
	 * @var array
	 */
	private $queued_urls = array();

	/**
	 * Flush all requests flag.
	 *
	 * @var bool
	 */
	private $flush_all_requested = false;

	/**
	 * Purges everything from CDNs that supports it.
	 *
	 * @param array $extras Extras to purge.
	 *
	 * @return bool
	 */
	public static function w3tc_flush_all( $extras = null ) {
		if ( isset( $extras['only'] ) &amp;&amp; 'cdn' !== $extras['only'] ) {
			return;
		}

		$config           = Dispatcher::config();
		$common           = Dispatcher::component( 'Cdn_Core' );
		$default_override = Cdn_Util::get_flush_manually_default_override();
		if ( $config-&gt;get_boolean( 'cdn.flush_manually', $default_override ) ) {
			// in this mode flush only on purge button clicks.
			if ( ! isset( $extras['ui_action'] ) ) {
				return true;
			}
		}

		$o                      = Dispatcher::component( 'Cdnfsd_CacheFlush' );
		$o-&gt;flush_all_requested = true;

		return true;
	}

	/**
	 * Purges cdn's post cache
	 *
	 * @param integer $post_id Post ID.
	 * @param boolean $force   Force Flag (optional).
	 * @param array   $extras  Extras.
	 *
	 * @return bool
	 */
	public static function w3tc_flush_post( $post_id, $force = false, $extras = null ) {
		if ( ! $post_id ) {
			$post_id = Util_Environment::detect_post_id();
		}

		if ( ! $post_id ) {
			return false;
		}

		$config           = Dispatcher::config();
		$common           = Dispatcher::component( 'Cdn_Core' );
		$default_override = Cdn_Util::get_flush_manually_default_override();
		if ( $config-&gt;get_boolean( 'cdn.flush_manually', $default_override ) ) {
			// in this mode flush only on purge button clicks.
			if ( ! isset( $extras['ui_action'] ) ) {
				return true;
			}
		}

		global $wp_rewrite; // required by many Util_PageUrls methods.
		if ( empty( $wp_rewrite ) ) {
			error_log( __( 'Post was modified before wp_rewrite initialization. Cant flush cache.', 'w3-total-cache' ) ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
			return false;
		}

		$full_urls = array();
		$post      = null;
		$terms     = array();

		$feeds            = $config-&gt;get_array( 'pgcache.purge.feed.types' );
		$limit_post_pages = $config-&gt;get_integer( 'pgcache.purge.postpages_limit' );

		if ( $config-&gt;get_boolean( 'pgcache.purge.terms' ) || $config-&gt;get_boolean( 'varnish.pgcache.feed.terms' ) ) {
			$taxonomies = get_post_taxonomies( $post_id );
			$terms      = wp_get_post_terms( $post_id, $taxonomies );
		}

		switch ( true ) {
			case $config-&gt;get_boolean( 'pgcache.purge.author' ):
			case $config-&gt;get_boolean( 'pgcache.purge.archive.daily' ):
			case $config-&gt;get_boolean( 'pgcache.purge.archive.monthly' ):
			case $config-&gt;get_boolean( 'pgcache.purge.archive.yearly' ):
			case $config-&gt;get_boolean( 'pgcache.purge.feed.author' ):
				$post = get_post( $post_id );
		}

		$front_page = get_option( 'show_on_front' );

		// Home (Frontpage) URL.
		if ( ( $config-&gt;get_boolean( 'pgcache.purge.home' ) &amp;&amp;
			'posts' === $front_page ) ||
			$config-&gt;get_boolean( 'pgcache.purge.front_page' ) ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_frontpage_urls( $limit_post_pages ) );
		}

		// Home (Post page) URL.
		if ( $config-&gt;get_boolean( 'pgcache.purge.home' ) &amp;&amp; 'posts' !== $front_page ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_postpage_urls( $limit_post_pages ) );
		}

		// Post URL.
		if ( $config-&gt;get_boolean( 'pgcache.purge.post' ) || $force ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_post_urls( $post_id ) );
		}

		// Post comments URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.comments' ) &amp;&amp; function_exists( 'get_comments_pagenum_link' ) ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_post_comments_urls( $post_id ) );
		}

		// Post author URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.author' ) &amp;&amp; $post ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_post_author_urls( $post-&gt;post_author, $limit_post_pages ) );
		}

		/**
		 * Post terms URLs
		 */
		if ( $config-&gt;get_boolean( 'pgcache.purge.terms' ) ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_post_terms_urls( $terms, $limit_post_pages ) );
		}

		/**
		 * Daily archive URLs
		 */
		if ( $config-&gt;get_boolean( 'pgcache.purge.archive.daily' ) &amp;&amp; $post ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_daily_archive_urls( $post, $limit_post_pages ) );
		}

		/**
		 * Monthly archive URLs
		 */
		if ( $config-&gt;get_boolean( 'pgcache.purge.archive.monthly' ) &amp;&amp; $post ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_monthly_archive_urls( $post, $limit_post_pages ) );
		}

		// Yearly archive URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.archive.yearly' ) &amp;&amp; $post ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_yearly_archive_urls( $post, $limit_post_pages ) );
		}

		// Feed blog URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.feed.blog' ) ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_feed_urls( $feeds ) );
		}

		// Feed comments URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.feed.comments' ) ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_feed_comments_urls( $post_id, $feeds ) );
		}

		// Feed autor URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.feed.author' ) &amp;&amp; $post ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_feed_author_urls( $post-&gt;post_author, $feeds ) );
		}

		// Feed terms URLs.
		if ( $config-&gt;get_boolean( 'pgcache.purge.feed.terms' ) ) {
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_feed_terms_urls( $terms, $feeds ) );
		}

		// Purge selected pages.
		if ( $config-&gt;get_array( 'pgcache.purge.pages' ) ) {
			$pages     = $config-&gt;get_array( 'pgcache.purge.pages' );
			$full_urls = array_merge( $full_urls, Util_PageUrls::get_pages_urls( $pages ) );
		}

		// Queue flush.
		if ( count( $full_urls ) ) {
			$o = Dispatcher::component( 'Cdnfsd_CacheFlush' );

			foreach ( $full_urls as $url ) {
				$o-&gt;queued_urls[ $url ] = '*';
			}
		}

		return true;
	}

	/**
	 * Purge a single url.
	 *
	 * @param unknown $url URL to purge.
	 * @param array   $extras Extras.
	 *
	 * @return bool
	 */
	public static function w3tc_flush_url( $url, $extras = null ) {
		$config           = Dispatcher::config();
		$common           = Dispatcher::component( 'Cdn_Core' );
		$default_override = Cdn_Util::get_flush_manually_default_override();
		if ( $config-&gt;get_boolean( 'cdn.flush_manually', $default_override ) ) {
			// in this mode flush only on purge button clicks.
			if ( ! isset( $extras['ui_action'] ) ) {
				return true;
			}
		}

		$o                      = Dispatcher::component( 'Cdnfsd_CacheFlush' );
		$o-&gt;queued_urls[ $url ] = '*';

		return true;
	}

	/**
	 * Clears global and repeated urls
	 *
	 * @param array $actions_made Actions made.
	 *
	 * @throws \Exception Exception.
	 *
	 * @return array
	 */
	public static function w3tc_flush_execute_delayed_operations( $actions_made ) {
		$o = Dispatcher::component( 'Cdnfsd_CacheFlush' );

		// Protection from incorrect w3tc upgrade operation when engine gets empty.
		$c      = Dispatcher::config();
		$engine = $c-&gt;get_string( 'cdnfsd.engine' );
		if ( empty( $engine ) ) {
			return $actions_made;
		}

		if ( $o-&gt;flush_all_requested ) {
			$core = Dispatcher::component( 'Cdnfsd_Core' );

			try {
				$engine = $core-&gt;get_engine();

				if ( ! is_null( $engine ) ) {
					$engine-&gt;flush_all();
					$actions_made[] = array( 'module' =&gt; 'cdn' );
				}
			} catch ( \Exception $ex ) {
				$actions_made[] = array(
					'module' =&gt; 'cdn',
					'error'  =&gt; $ex-&gt;getMessage(),
				);
			}

			$o-&gt;flush_all_requested = false;
			$o-&gt;queued_urls         = array();
		} else {
			$count = count( $o-&gt;queued_urls );
			if ( $count &gt; 0 ) {
				$urls = array_keys( $o-&gt;queued_urls );

				$core = Dispatcher::component( 'Cdnfsd_Core' );

				try {
					$engine = $core-&gt;get_engine();

					if ( ! is_null( $engine ) ) {
						$engine-&gt;flush_urls( $urls );
						$actions_made[] = array( 'module' =&gt; 'cdn' );
					}
				} catch ( \Exception $ex ) {
					$actions_made[] = array(
						'module' =&gt; 'cdn',
						'error'  =&gt; $ex-&gt;getMessage(),
					);
				}

				$o-&gt;queued_urls = array();
			}
		}

		return $actions_made;
	}
}
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