Automatically Add ALT+TITLE to Images in the_content() output

This will automatically assign the ALT & TITLE attributes to <img> elements that miss those. The value will be the post title ( aka get_the_title() );

<?php
function add_alt_tags($content)
{
        global $post;
        preg_match_all('/<img (.*?)\/>/', $content, $images);
        if(!is_null($images))
        {
                foreach($images[1] as $index => $value)
                {
						$new_img = $images[0][$index];
                        if(!preg_match('/alt=/', $value))
                        {
                                $new_img = str_replace('<img', '<img alt="'.$post->post_title.'"', $images[0][$index]);
                        }
                        if(!preg_match('/title=/', $value))
                        {
                                $new_img = str_replace('<img', '<img title="'.$post->post_title.'"', $images[0][$index]);
                        }
						$content = str_replace($images[0][$index], $new_img, $content);
                }
        }
        return $content;
}
add_filter('the_content', 'add_alt_tags', 99999);