Wordpress: Set Maximum Post Title Length

max_character_title.php

function maxWord($title){  
  global $post;  $title = $post->post_title;
    if (str_word_count($title) >= 10 ) //set this to the maximum number of words   
    wp_die( __('Error: your post title is over the maximum word count.') );
  }
add_action('publish_post', 'maxWord');