Gallery Shortcode Showing IDs

Question

I'm trying to include a gallery in my custom post type. The image gallery works in the editor, but when I view the post I get this.

[gallery link="file" ids="590,589,588,587,586,585,578,580,581,582,583,584"]

My content looks like this:

<?php if ( have_posts() ) : while ( have_posts() ) : the_post();

    $content = get_the_content();
    /** ... **/
?>
    <p><?php echo $content ; ?></p>

Answer 1

Remove:

$content = get_the_content();

and replace:

<p><?php echo $content; ?></p>

with:

<?php the_content(); ?>

See this note on the Codex page for get_the_content():

An important difference from the_content() is that get_the_content() does not pass the content through the 'the_content' filters. This means that get_the_content() will not auto-embed videos or expand shortcodes, among other things.