There’s a convenient button for the <!--more--> tag on the toolbar, but nothing for the <!--nextpage--> quicktag. Fix that with this
add_filter('mce_buttons','add_nextpage_button');
function add_nextpage_button($buttons) {
//array_splice so we can insert the new item without overwriting an existing button
array_splice($buttons, 15,0, 'wp_page' );
return $buttons;
}
If you need to auto-append information to the end of your page/post content, there’s an easier way to do it than editing your theme.
add_filter( 'the_content', 'append_to_content' );
function append_to_content($content) {
global $post;
//if you want to restrict this to a specific post type
if (get_post_type($post) == 'post') {
$content .= '<p style="text-align:center;">***</p>';
}
return $content;
}
Can be especially useful for auto-appending custom field information