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Currently I am trying to replace the $post global with another dynamically loaded post in the wp action. However, while even in the templates the correct post data shows when outputting $post, the actual output content isn't updated. I backtraced through the entire the_content function, but I can't find anything out of the ordinary.

Is this even possible, and if so, what am I missing?

  • Changing the $post global is not going to help you as anything later on can change the its value. Even the main loop changes the $post global. IMHO, you are on the wrong track here – Pieter Goosen Feb 26 '16 at 8:39
  • But I assume WordPress is basing these changes to the value on something, isn't it? – Thierry Feb 26 '16 at 9:07
  • $post by default, if nothing breaks it, holds the first post in the loop of the main query – Pieter Goosen Feb 26 '16 at 9:11
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You can try with using pre_get_posts

add_action('pre_get_posts','alter_query');

function alter_query($query) { //gets the global query var object global $wp_query;

//gets the front page id set in options
$front_page_id = get_option('page_on_front');

if ( 'page' != get_option('show_on_front') || $front_page_id != $wp_query->query_vars['page_id'] )
    return;

if ( !$query->is_main_query() )
    return;

$query-> set('post_type' ,'page');
$query-> set('post__in' ,array( $front_page_id , [YOUR SECOND PAGE ID]  ));
$query-> set('orderby' ,'post__in');
$query-> set('p' , null);
$query-> set( 'page_id' ,null);

//we remove the actions hooked on the '__after_loop' (post navigation)
remove_all_actions ( '__after_loop');

}

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