Getting content from a single *page* of a post

2 comments

1. This should do the trick:

   /**
    * For posts paginated using <!--nextpage-->, return a particular "page" of content.
    * This function uses code from WP's setup_postdata() function.
    * @param string $content the content to search for paginated page content.
    * @param int $page_number the index of the page to return the content for.
    */
   function get_nextpage_content( $content, $page_number ) {
       if ( strpos( $content, '<!--nextpage-->' ) ) {
           $content = str_replace("n<!--nextpage-->n", '<!--nextpage-->', $content);
           $content = str_replace("n<!--nextpage-->", '<!--nextpage-->', $content);
           $content = str_replace("<!--nextpage-->n", '<!--nextpage-->', $content);
           $pages = explode('<!--nextpage-->', $content);
           return ( isset ( $pages[$page_number - 1] ) ) ? $pages[$page_number - 1] : false;
       } else {
           return false;
       }
   }
   

   Usage:

   // Get the second page of content with a paginated post
   echo apply_filters( 'the_content', get_nextpage_content( $post->post_content, 2 ) );
   

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2. You should first explode the content, and then perform a few functions on the content to enable WordPress’ “Auto paragraph” formatting and Shortcodes.

   $post_content = $wpdb->get_var("SELECT post_content FROM $wpdb->posts WHERE ID = {$post->ID} LIMIT 0,1");
   $raw_pages = explode('<!--nextpage-->', $post_content);
   foreach($raw_pages as $raw_page){
       $pages[] = wpautop( do_shortcode( trim($main_content) ) );
   }
   

   Now you can echo each page like so:

   <?php echo $page[0]; // Page 1 ?>
   

   You can also implement this feature/concept a tad differently. I like to split my post into two pages to give my copywriter the ability to create the main content and sidebar content. I basically assign the second page to the sidebar. While you could use the same code as above, a cleaner (yet less flexible way) might be to do something like this…

   $post_content = $wpdb->get_var("SELECT post_content FROM $wpdb->posts WHERE ID = {$post->ID} LIMIT 0,1");
   list($main_content, $sidebar_content) = explode('<!--nextpage-->', $post_content);
   $main_content = wpautop( do_shortcode( trim($main_content) ) );
   $sidebar_content = wpautop( do_shortcode( trim($sidebar_content ) ) );
   

   Now I can just echo out either the $main_content or $sidebar_content variable wherever I want in my page template.

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