I'm trying to build a function to display the current chapter (page) within the single.php file ONLY if there's more than one chapter (page break).

This function will output the chapter # within the page header under the title. Then I will customize and use the wp_link_pages at the bottom for the chapter pagination.

Currently, my function doesn't work, it return nothing and if I remove the the IF statement if ( $multipage ) {} it return "Chapter 0".

I need advice on this one.

* Get current chapter number
if ( ! function_exists( 'sbwp_get_current_chapter' ) ) {

    function sbwp_get_current_chapter() {

        global $page, $numpages, $multipage, $more;

        if ( $multipage ) {
            echo '<p class="page-link accent">';
            echo esc_html(( '' . __( "Chapter ", "sbwp" ) . '' . $page ));
            echo '</p>';


  • How's your loop? Does it contain a call to the_post() ? Does it work on the default theme? – birgire Apr 30 '15 at 14:11
  • @birgire The function is called outside of the loop. Here is the complete single.php on Pastebin – Simon Bouchard Apr 30 '15 at 14:43

The $multipage is constructed inside the setup_postdata() method of WP_Query. It's called when you run the_post(). So just as @s_ha_dum explained, you have to make a loop around it:

You can try this:

if( have_posts() )
    the_post();                      // Make a call to setup_postdata().
    echo sbwp_get_current_chapter(); // Display the current chapter.
    rewind_posts();                  // Rewind back.

before your main loop, where you must remember to rewind back.


$multipage is an "inside the Loop" variable. I did not track down exactly where and how it is set but given that information alone the obvious solution is to put your code inside a Loop, which is good practice anyway as a number of things depend upon that Loop. Something like:

if (have_posts()) {
    while (have_posts() {
      $sbwp_story_thumbnail = "";
      // ....
  • Thank you sir, I have resolved this issue. My function needed to placed inside the loop as you said. – Simon Bouchard Apr 30 '15 at 15:40

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