Ticket #3794: title-auto-generation.php

<?php
/*
Plugin Name: Title auto-generation
Plugin URI: http://justinsomnia.org/
Description: Auto-generate titles on post publication based on initial content of post
Version: 0
Author: Justin Watt
Author URI: http://justinsomnia.org/
*/

function auto_generate_title($post)
{
        $title_length = 50;
        $ellipsis     = "...";

        if (trim($post['post_title']) != '') {
                return $post;
        }

        $title = '';
        $content = preg_replace('|\s+|', ' ', strip_tags($post['content']));
        
        foreach ( explode(' ', $content) as $word ) {
                if ( (strlen($title) + strlen($word)) > $title_length ) {
                        if ( empty($title) )
                                $title = substr($content, 0, $title_length);

                        if ( !empty($title) )
                                $title = trim($title) . $ellipsis;

                        break;
                }
                $title .= $word . " ";
        }
        
        $post['post_title'] = trim($title);

        return $post;
}

add_filter('post_publish_pre', 'auto_generate_title');

?>