Ticket #25585: 25585.patch

src/wp-includes/query.php

@@ -2001 +2001 @@
                         if ( in_array( call_user_func( $strtolower, $term ), $stopwords, true ) )
                                 continue;
 
+                        /**
+                         * Filter a search term after it has passed through the length and stopwords checks.
+                         *
+                         * Can be used to alter or remove a term.
+                         *
+                         * @since 3.7.0
+                         *
+                         * @param string $term The search term.
+                         */
+                        if ( ! $term = apply_filters( 'wp_search_term', $term ) )
+                                continue;
+
                         $checked[] = $term;
                 }