gistfile1.php

<?php
    public function filter_post_content_out_1($content, $post) {
        if (strpos($content, '<!--break-->') !== false){
            $pages = explode('<!--break-->', $content);
            $page = Controller::get_var('page', 1) - 1;
            if ( array_key_exists($page, $pages) ) {
                return $pages[$page];
            }
        }
        return $content;
    }
?>