the_content outputs a number

Have you tried:

– deactivating all plugins to see if this resolves the problem? If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the default theme to rule out any theme-related problems?

There is no plugin activated.
The problem is surely theme related, and it is related to the modifications i made but i find the fact that the_title() works and the_content() doesn’t very odd. There is no php code between them.

You can see the code from page.php here https://pastebin.com/d3Qa8Z7w

Can you describe the goal of that Page Template?

I’m trying to get the page’s next and previous “brother”.
Here i am trying to make an array with all the page’s brothers (their IDs)

$pagelist = get_pages("child_of=".$post->post_parent."&parent=".$post->post_parent."&sort_column=menu_order&sort_order=asc");
$pages = array();
foreach ($pagelist as $page) {
   $pages[] += $page->ID;
}

Then i search for the current page id in that array and i remember the position. That means that the previous array element is the id of the previous page, and the next element is the id of the next page.

$current = array_search($post->ID, $pages);
$prevID = $pages[$current-1];
$nextID = $pages[$current+1];

Based on those IDs i show the post title and permalink using get_the_title() and get_permalink(). This works fine. But when i try to display that page info using this:

<div class="post" id="post-<?php the_ID(); ?>">
		<h2><?php the_title(); ?></h2>
			<div class="entry">
				<?php the_content('<p class="serif">Read the rest of this page &raquo;</p>'); ?>
        <?php echo $post->post_content; ?>

				<?php wp_link_pages(array('before' => '<p><strong>Pages:</strong> ', 'after' => '</p>', 'next_or_number' => 'number')); ?>

			</div>
		</div>

Everything shows ok except the_content() which returns a number.

I’ve found the problem.
Changing the array from $pages to something else and the variable in the foreach statement from $page to something else fixed the problem.
Are they reserved names? I wouldn’t have expected that since i started from an example that was on the wordpress codex. (link).
Hope somebody will shed some light