Strip forbidden characters from the end of search term to avoid synta…

…x errors (#141)

* Strip forbidden characters from the end of search term to avoid syntax errors

* Revert syntax tweaking

* Simplify logic

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [2.0.10] - 2024-08-16
+
+### Fixed
+- Strip forbidden characters from the end of search term to avoid syntax errors.
+
 ## [2.0.9] - 2024-01-18
 
 ### Fixed

plugin.php

@@ -3,7 +3,7 @@
  * Plugin Name: RediPress
  * Plugin URI:  https://github.com/devgeniem/redipress
  * Description: A WordPress plugin that provides a blazing fast search engine and WP Query performance enhancements.
- * Version:     2.0.9
+ * Version:     2.0.10
  * Author:      Geniem
  * Author URI:  http://www.geniem.fi/
  * License:     GPL3

src/Search/QueryBuilder.php

@@ -349,6 +349,14 @@ protected function conduct_search( string $parameter ) : string {
         $terms = apply_filters( 'redipress/search_terms/raw', $terms );
         $terms = apply_filters( 'redipress/search_terms/raw/' . static::TYPE, $terms );
 
+        // Remove a list of forbidden characters if they appear as the very last character ignoring trailing whitespace.
+        $terms                     = rtrim( $terms );
+        $forbidden_last_characters = str_split( '*/`' );
+
+        while ( in_array( substr( $terms, -1 ), $forbidden_last_characters, true ) ) {
+            $terms = substr( $terms, 0, -1 );
+        }
+
         // Remove a list of forbidden characters based on RediSearch restrictions.
         $forbidden_characters = str_split( ',.<>{}[]"\':;!?@#$%^&()+=~' );