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');

?>