WordPress: Custom post type shortcode

movies_post_type_shortcode.php

<?php
add_shortcode( 'vh_movies', function() {
	$loop = new WP_Query(
		array(
			'post_type' => 'vh_movie',
			'orderby' => 'title'
		)
	);

	if ( $loop->have_posts() ) {

		$output = '<ul class="vh_movie_list">';

		while ( $loop->have_posts() ) {
			$loop->the_post();

			$meta = get_post_meta(get_the_id(), '');

			// print_r($meta);

			$output .= '
				<li>
					<a href="' . get_permalink() . '">'
					. get_the_title() . ' | '.
					$meta['vh_movie_length'][0] .
					'</a>' .
					'<div>' . get_the_excerpt() . '</div>'
				. '</li>';
		}
	} else {
		$output = 'No movies added.';
	}

	return $output;
} );