Get page by its ID and display it on another one

Question

I want to display a page with ID=1149 in a particular place on another page. For that I've tried with this:

    <div class="col-md-4 sidebarl"> 
      <?php
      $args = array(
          'post_type' => 'page',
          'post__in' => array(1149)
      );
      $query = new WP_Query($args);
      while ($query->have_posts()) {
        $query->the_post();
      }
      ?>
    </div>

But I am not getting anything, an empty page. Am I missing something?

Answer 1

I am not getting anything, an empty page. Am I missing something?

Yes, you are.

$query->the_post() does not display anything — it just moves the pointer/key in the posts array ($query->posts) to the next one, and setups the global post data ($GLOBALS['post']). So yes, in response to your answer, the_content() would be what you would use to display the content of the current post in the loop.

But actually, you could simply use the page_id parameter like so, to query a post of the page type and having a specific ID:

$args = array(
    // Instead of using post_type and post__in, you could simply do:
    'page_id' => 1149,
);

Also, you should call wp_reset_postdata() after your loop ends so that template tags (e.g. the_content() and the_title()) would use the main query’s current post again.

while ($query->have_posts()) {
    $query->the_post();
    the_content();
}

wp_reset_postdata();

And just so that you know, you could also use get_post() and setup_postdata() like so, without having to use the new WP_Query() way:

//global $post; // uncomment if necessary
$post = get_post( 1149 );
setup_postdata( $post );
the_title();
the_content();
// ... etc.

wp_reset_postdata();

Answer 2

I am not sure if this is the correct answer, but I did it this way:

    <div class="col-md-4 sidebarl"> 
      <?php
      $args = array(
          'post_type' => 'page',
          'post__in' => array(1149)
      );
      $query = new WP_Query($args);
      while ($query->have_posts()) {
        $query->the_post();
        the_content();
      }
      ?>
    </div>

Answer 3

You can try using the function "get_template_part()". But to do this, you need to create a php-template for your current page and php-template for page 1149. Then, in your current page template, you include another template:

/**
 * Template Name: My current page template
 * Template Post Type: page
 */
<?php get_header(); ?>
<?php the_content(); ?>
...
<?php
  /* include template from page 1149 */
  get_template_part( 'page-1149' ); 
?>
...

https://developer.wordpress.org/reference/functions/get_template_part/