Problem with SuperCache and Polylang (multiple domains)

You can use this code in your functions.php file. This will clear the cache for posts when you update it. I’m not sure how the delete all cached pages would work as there are no hooks:

// Fix Polylang WP Super Cache problem
function jb_clear_polylang_super_cache( $post_ID, $post_after, $post_before ) {
	if ( ! empty( $post_after ) ) {
		$parsed_url = parse_url( get_permalink( $post_after->ID ) );
		if ( $parsed_url ) {
			global $cache_path;
			$language = pll_get_post_language( $post_after->ID );
			$cache_dir = $cache_path . 'supercache/' . $parsed_url['host'] . $parsed_url['path'];
			$files = get_all_supercache_filenames( $cache_dir );
			if ( $files ) {
				foreach( $files as $cache_file ) {
					prune_super_cache( $cache_dir . $cache_file, true );
				}
			}
		}
	}
}
add_action( 'post_updated', 'jb_clear_polylang_super_cache', 10, 3 );

Exact same problem with me I will try Junaid Bhura’s way then I’ll post again.

Unfortunately It made an error for me.
Anyone has clever method?

I am busy with a plugin at this point. Hope to get it on the repository this month. (Clear all cache on all domains is working.)

Ill keep you posted!

Thanks so much for your work! Really appreciate it.

No problem!

For a quick fix at this point that should work fine, Add the following code to the functions.php in your theme:

IMPORTANT:
– This code will always delete ALL cache for the domains.
– WP Super Cache needs to be active! (tested on latest version: 1.4.x)
– Polylang needs to be active! (tested on latest version: 1.8.x)

add_action( 'wp_trash_post', 'my_theme_clear_all_cache_all_languages', 0);
add_action( 'publish_post', 'my_theme_clear_all_cache_all_languages', 0);
add_action( 'edit_post', 'my_theme_clear_all_cache_all_languages', 0);
add_action( 'delete_post', 'my_theme_clear_all_cache_all_languages', 0);
add_action( 'wp_update_nav_menu', 'my_theme_clear_all_cache_all_languages' );
add_action( 'clean_post_cache', 'my_theme_clear_all_cache_all_languages' );
function my_theme_clear_all_cache_all_languages() {
	$blog_id = get_current_blog_id();
	if (isset($polylang)) {
	  $languages = $polylang->get_languages_list();
	}
	if ( ! empty( $languages ) ) {
		foreach ( $languages as $lang ) {
			$url = $lang->home_url;
			$url = trailingslashit( strtolower( preg_replace( '/:.*$/', '', str_replace( 'https://', '', str_replace( 'https://', '', $url ) ) ) ) );
			if ( $this->blog_id == 0 ) {
				$defaultUrl = get_option( 'home' );
			} else {
				$defaultUrl = get_blog_option( $blog_id, 'home' );
			}
			$defaultUrl = trailingslashit( strtolower( preg_replace( '/:.*$/', '', str_replace( 'https://', '', str_replace( 'https://', '', $defaultUrl ) ) ) ) );
			$defaultCacheDir = get_supercache_dir( $blog_id );
			$cacheDir = str_replace( $defaultUrl, $url, $defaultCacheDir );
			prune_super_cache( $cacheDir, true );
		}
	}
}