Wordpress: single.php doesn't display the_content() - php

Question

I'm creating a custom Wordpress Theme and I can't seem to get the single.php template to work. Below is the code I have written. The title comes up but the content doesn't. Any Ideas why it isn't?
<?php
/**
* The Template for displaying all single posts.
*/
get_header(); ?>
<div id="content" role="main">
<div <?php post_class() ?> id="post-<?php the_ID(); ?>">
<h2><?php the_title(); ?></h2>
<small><?php the_time('F jS, Y') ?> <!-- by <?php the_author() ?> --></small>
<div class="entry">
<?php the_content(); ?>
</div>
<p class="postmetadata"><?php the_tags('Tags: ', ', ', '<br />'); ?> Posted in <?php the_category(', ') ?> | <?php edit_post_link('Edit', '', ' | '); ?> <?php comments_popup_link('No Comments »', '1 Comment »', '% Comments »'); ?></p>
</div>
</div><!-- #content -->
See here for a screenshot of the output:

Answer 1

the_content() is not displaying because it has to be inside the The Loop - take a look at the docs here »
You need to change your code to this:
if ( have_posts() ) : while ( have_posts() ) : the_post();
the_content();
endwhile;
else:
<p><?php _e('Sorry, no posts matched your criteria.'); ?></p>
endif;
You can leave out the else if you are always sure you have content to display :) Or just take look at the original single.php where you can find The Loop always surrounds the_content()
edit:
Here is the whole single.php you might wanna use/start with:
<?php
/**
* The Template for displaying all single posts.
*/
get_header(); ?>
<div id="content" role="main">
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<div <?php post_class() ?> id="post-<?php the_ID(); ?>">
<h2><?php the_title(); ?></h2>
<small><?php the_time('F jS, Y') ?> <!-- by <?php the_author() ?> --></small>
<div class="entry">
<?php the_content(); ?>
</div>
<p class="postmetadata"><?php the_tags('Tags: ', ', ', '<br />'); ?> Posted in <?php the_category(', ') ?> | <?php edit_post_link('Edit', '', ' | '); ?> <?php comments_popup_link('No Comments »', '1 Comment »', '% Comments »'); ?></p>
</div>
<?php endwhile; endif; ?>
</div><!-- #content -->

Answer 2

I just simply put the_post() above the_content() and it worked

Answer 3

I'm writing this because I had a similar problem. My content wasn't showing up. However my call to the_content was inside the The Loop. Furthermore, this was working on my development server but not on the production server.
I was able to solve this by removing all the plugins and then, one by one, add them back in.
Also, of course, if you have caching enabled, a good first step is to clear the cache.