Word title limit WordPRess

WP Title Limit

function limit_word_count($title) {
    $len = 5; //change this to the number of words
    if (str_word_count($title) > $len) {
        $keys = array_keys(str_word_count($title, 2));
        $title = substr($title, 0, $keys[$len]);
    }
    return $title;
}
add_filter('the_title', 'limit_word_count');