Closes #5815 Correctly clear cache for URLs whose permalink contains …

…uppercase letters in non-latin alphabets (#5852)

Co-authored-by: Rémy Perona <[email protected]>

inc/functions/files.php

@@ -572,7 +572,6 @@ function rocket_clean_files( $urls, $filesystem = null ) {
 	do_action( 'before_rocket_clean_files', $urls ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
 
 	foreach ( $urls as $url ) {
-
 		/**
 		 * Fires before the cache file is deleted.
 		 *
@@ -596,7 +595,25 @@ function rocket_clean_files( $urls, $filesystem = null ) {
 
 		if ( ! empty( $parsed_url['host'] ) ) {
 			foreach ( _rocket_get_cache_dirs( $parsed_url['host'], $cache_path ) as $dir ) {
+				// Decode url path.
+				$url_chunks = explode( '/', $parsed_url['path'] );
+				$matches    = preg_grep( '/%/', $url_chunks );
+
+				if ( ! empty( $matches ) ) {
+					$parsed_url['path'] = rawurldecode( $parsed_url['path'] );
+				}
+
+				// Encode Non-latin characters if found in url path.
+				if ( false !== preg_match_all( '/(?<non_latin>[^\x00-\x7F]+)/', $parsed_url['path'], $matches ) ) {
+					$cb_encode_non_latin = function( $non_latin ) {
+						return strtolower( rawurlencode( $non_latin ) );
+					};
+
+					$parsed_url['path'] = str_replace( $matches['non_latin'], array_map( $cb_encode_non_latin, $matches['non_latin'] ), $parsed_url['path'] );
+				}
+
 				$entry = $dir . $parsed_url['path'];
+
 				// Skip if the dir/file does not exist.
 				if ( ! $filesystem->exists( $entry ) ) {
 					continue;