bbp_get_search_terms( string $passed_terms = '' )

	function bbp_get_search_terms( $passed_terms = '' ) {

		// Sanitize terms if they were passed in
		if ( !empty( $passed_terms ) ) {
			$search_terms = sanitize_title( $passed_terms );

		// Use query variable if not
		} else {
			$search_terms = get_query_var( bbp_get_search_rewrite_id() );
		}

		// Trim whitespace and decode, or set explicitly to false if empty
		$search_terms = !empty( $search_terms ) ? urldecode( trim( $search_terms ) ) : false;

		return apply_filters( 'bbp_get_search_terms', $search_terms, $passed_terms );
	}