Question

What happens?

I’m guessing that somehow the post or page is parsed before displaying, and then just split into two methods? I can’t seem to find any documentation on how the underlying

<?php wp_link_pages( $args ); ?> 

method actually works. Is all of this processing done before the user loads the concerned page, or is it scanned and then stored separately inside the database?

Answer 1

WordPress uses the PHP explode function to split the content into a array of ‘pages’. Happens in the setup_postdata function with this code:

$pages = explode('<!--nextpage-->', $content);